{"id":18616,"date":"2025-08-04T10:07:33","date_gmt":"2025-08-04T02:07:33","guid":{"rendered":"https:\/\/92it.top\/?p=18616"},"modified":"2025-08-04T14:50:05","modified_gmt":"2025-08-04T06:50:05","slug":"%e9%98%bf%e9%87%8c%e9%9d%a2%e8%af%95%ef%bc%9amysql-%e4%b8%80%e4%b8%aa%e8%a1%a8%e6%9c%80%e5%a4%9a-%e5%8a%a0%e5%87%a0%e4%b8%aa%e7%b4%a2%e5%bc%95%ef%bc%9f-6%e4%b8%aa%ef%bc%9f64%e4%b8%aa%ef%bc%9f%e8%bf%98","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=18616","title":{"rendered":"\u963f\u91cc\u9762\u8bd5\uff1aMySQL \u4e00\u4e2a\u8868\u6700\u591a \u52a0\u51e0\u4e2a\u7d22\u5f15\uff1f 6\u4e2a\uff1f64\u4e2a\uff1f\u8fd8\u662f\u591a\u5c11\uff1f"},"content":{"rendered":"\n<p>\u6700\u8fd1\u6709\u5c0f\u4f19\u4f34\u62ff\u5230\u4e86\u4e00\u7ebf\u4e92\u8054\u7f51\u4f01\u4e1a\u5982\u5f97\u7269\u3001\u963f\u91cc\u3001\u6ef4\u6ef4\u3001\u6781\u5154\u3001\u6709\u8d5e\u3001shein \u5e0c\u97f3\u3001shopee\u3001\u767e\u5ea6\u3001\u7f51\u6613\u7684\u9762\u8bd5\u8d44\u683c\uff0c\u9047\u5230\u5f88\u591a\u5f88\u91cd\u8981\u7684\u9762\u8bd5\u9898\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"> mysql\u4e2d\uff0c\u4e00\u4e2a\u8868\u6700\u591a\u53ea\u80fd\u52a0\u591a\u5c11\u4e2a\u7d22\u5f15\u561b\uff1f\u4e00\u4e2a\u8054\u5408\u7d22\u5f15\u6700\u591a\u53ea\u80fd\u591a\u5c11\u5217\u5462\uff1f<br> \u7d22\u5f15\u52a0\u591a\u4e86\uff0c\u4f1a\u5b58\u5728\u54ea\u4e9b\u95ee\u9898\u5462\uff1f<br> InnoDB\u5b58\u50a8\u5f15\u64ce<br> MyISAM\u5b58\u50a8\u5f15\u64ce<br> \u4e00\u4e2a\u8868\u8bbe\u8ba1\u591a\u5c11\u4e2a\u7d22\u5f15\u5408\u7406\u5462\uff1f<br> \u7d22\u5f15\u8bbe\u8ba1\u8fc7\u591a\u5b58\u5728\u54ea\u4e9b\u95ee\u9898\uff1f<br> \u963f\u91cc\u5df4\u5df4\u7f16\u7a0b\u89c4\u8303\u4e2d\uff0c\u5355\u8868\u7d22\u5f15\u6570\u91cf\uff0c\u5efa\u8bae\u63a7\u5236\u57285\u4e2a\u4ee5\u5185\uff0c\u4e3a\u4ec0\u4e48\uff1f<\/pre>\n\n\n\n<p>\u524d\u51e0\u5929 \u5c0f\u4f19\u4f34\u9762\u8bd5\u963f\u91cc\uff0c\u9047\u5230\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002\u4f46\u662f\u7531\u4e8e \u6ca1\u6709\u56de\u7b54\u597d\uff0c\u5bfc\u81f4\u9762\u8bd5\u6302\u4e86\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>1. \u7d22\u5f15\u57fa\u7840 \uff1a\u4e00\u4e2a \u8868\u7684 &#8220;\u6570\u636e\u76ee\u5f55&#8221;<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>1.1 \u4ec0\u4e48\u662f \u7d22\u5f15\uff1f<\/strong><\/p>\n\n\n\n<ul>\n<li>\u6ca1\u6709\u7d22\u5f15\uff1a\u6570\u636e\u5e93\u8981\u626b\u63cf\u6574\u5f20\u8868\uff0c\u5c31\u50cf\u4f60\u4ece\u56fe\u4e66\u9986\u7b2c\u4e00\u672c\u4e66\u5f00\u59cb\u627e<\/li>\n\n\n\n<li>\u6709\u7d22\u5f15\uff1a\u76f4\u63a5\u5b9a\u4f4d\u5230\u6570\u636e\u4f4d\u7f6e\uff0c\u6548\u7387\u63d0\u5347\u51e0\u5341\u751a\u81f3\u4e0a\u767e\u500d<\/li>\n<\/ul>\n\n\n\n<p>\u7d22\u5f15\u5c31\u662f&#8221;\u6570\u636e\u7684\u76ee\u5f55&#8221; \uff0c \u60f3\u8c61\u4e00\u4e0b\u4f60\u53bb\u56fe\u4e66\u9986\u627e\u4e66\uff0c\u6ca1\u6709\u76ee\u5f55\u7684\u8bdd\u4f60\u5f97\u4e00\u672c\u672c\u7ffb\uff0c\u6709\u4e86\u76ee\u5f55\u5c31\u80fd\u76f4\u63a5\u627e\u5230\u60f3\u8981\u7684\u4e66\u3002\u7d22\u5f15\u5c31\u662f\u6570\u636e\u5e93\u7684&#8221;\u6570\u636e\u76ee\u5f55&#8221;\uff0c\u5b83\u80fd\u5e2e\u4f60\u5feb\u901f\u5b9a\u4f4d\u6570\u636e\u3002\u5728MySQL\u4e2d\uff0c\u7d22\u5f15 \u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u901a\u5e38\u662fB+\u6811\uff0c\u5b83\u5b58\u50a8\u7740\u5b57\u6bb5\u503c \u548c\u5bf9\u5e94\u8bb0\u5f55\u7684\u4e3b\u952e\u503c\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>1.2 \u4e3a\u4ec0\u4e48\u9700\u8981\u7d22\u5f15\uff1f<\/strong><\/p>\n\n\n\n<p>\u6ca1\u6709\u7d22\u5f15\u65f6\uff0c\u6570\u636e\u5e93\u8981\u6267\u884c\u5168\u8868\u626b\u63cf\uff0c\u5c31\u50cf\u4f60\u4ece\u56fe\u4e66\u9986\u7b2c\u4e00\u672c\u4e66\u5f00\u59cb\u4e00\u672c\u672c\u627e\uff0c\u6570\u636e\u91cf\u8d8a\u5927\u67e5\u8be2\u8d8a\u6162\u3002\u6709\u7d22\u5f15\u540e\uff0c\u6570\u636e\u5e93\u53ef\u4ee5\u76f4\u63a5\u5b9a\u4f4d\u6570\u636e\u4f4d\u7f6e\uff0c\u6548\u7387\u63d0\u5347\u51e0\u5341\u751a\u81f3\u4e0a\u767e\u500d\u3002\u6570\u636e\u91cf\u8d8a\u5927\uff0c \u7d22\u5f15\u7684\u4ef7\u503c\u5c31\u5927\uff0c \u5728\u767e\u4e07\u7ea7\u3001\u751a\u81f3\u5343\u4e07\u7ea7\u7684 \u8868\u4e2d\uff0c\u6709\u7d22\u5f15\u7684\u67e5\u8be2\u53ef\u80fd\u53ea\u9700\u51e0\u6beb\u79d2\uff0c\u6ca1\u7d22\u5f15\u53ef\u80fd\u8981\u51e0\u79d2\uff0c \u751a\u81f3\u66f4\u4e45\u3002\u4f46\u51e1\u4e8b\u90fd\u6709\u4e0d\u5229\u7684\u4e00\u9762\uff0c &nbsp;\u7d22\u5f15\u4e0d\u662f\u4e07\u80fd\u7684\uff0c\u5b83\u662f\u4ee5\u989d\u5916\u5b58\u50a8\u7a7a\u95f4\u548c\u5199\u5165\u6027\u80fd\u4e3a\u4ee3\u4ef7\u6362\u53d6\u67e5\u8be2\u901f\u5ea6\u7684\u63d0\u5347\uff0c\u9700\u8981\u6743\u8861\u5229\u5f0a\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>1.3 \u7d22\u5f15\u7684\u5e38\u89c1\u7c7b\u578b<\/strong><\/p>\n\n\n\n<p>\u7d22\u5f15\u7684\u5e38\u89c1\u7c7b\u578b\u6709\uff1a<\/p>\n\n\n\n<ul>\n<li>\u666e\u901a\u7d22\u5f15\uff1a\u6700\u57fa\u672c\u7684\u7d22\u5f15\uff0c\u6ca1\u6709\u4efb\u4f55\u9650\u5236<\/li>\n\n\n\n<li>\u552f\u4e00\u7d22\u5f15\uff1a\u8981\u6c42\u7d22\u5f15\u5217\u7684\u503c\u5fc5\u987b\u552f\u4e00<\/li>\n\n\n\n<li>\u4e3b\u952e\u7d22\u5f15\uff1a\u7279\u6b8a\u7684\u552f\u4e00\u7d22\u5f15\uff0c\u4e0d\u5141\u8bb8\u6709\u7a7a\u503c<\/li>\n\n\n\n<li>\u8054\u5408\u7d22\u5f15\uff1a\u591a\u4e2a\u5217\u7ec4\u5408\u7684\u7d22\u5f15<\/li>\n<\/ul>\n\n\n\n<p>\u666e\u901a\u7d22\u5f15\u662f\u6700\u57fa\u672c\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u6ca1\u6709\u4efb\u4f55\u9650\u5236\uff0c\u5141\u8bb8\u91cd\u590d\u503c\u548c\u7a7a\u503c\u3002<\/p>\n\n\n\n<p>\u552f\u4e00\u7d22\u5f15\u8981\u6c42\u7d22\u5f15\u5217\u7684\u503c\u5fc5\u987b\u552f\u4e00\uff0c\u4f46\u5141\u8bb8\u6709\u7a7a\u503c\u3002<\/p>\n\n\n\n<p>\u4e3b\u952e\u7d22\u5f15\u662f\u7279\u6b8a\u7684\u552f\u4e00\u7d22\u5f15\uff0c\u4e0d\u5141\u8bb8\u6709\u7a7a\u503c\uff0c\u6bcf\u4e2a\u8868\u53ea\u80fd\u6709\u4e00\u4e2a\u3002<\/p>\n\n\n\n<p>\u8054\u5408\u7d22\u5f15\u662f\u591a\u4e2a\u5217\u7ec4\u5408\u7684\u7d22\u5f15\uff0c\u9075\u5faa\u6700\u5de6\u524d\u7f00\u539f\u5219\u3002<\/p>\n\n\n\n<p>\u6b64\u5916\u8fd8\u6709\u5168\u6587\u7d22\u5f15\u3001\u7a7a\u95f4\u7d22\u5f15\u7b49\u7279\u6b8a\u7c7b\u578b\u3002<\/p>\n\n\n\n<p>\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\u9002\u7528\u4e8e\u4e0d\u540c\u573a\u666f\uff0c\u6bd4\u5982\u7528\u6237\u540d\u9002\u5408\u7528\u552f\u4e00\u7d22\u5f15\uff0c\u6587\u7ae0\u5185\u5bb9\u9002\u5408\u7528\u5168\u6587\u7d22\u5f15\u3002<\/p>\n\n\n\n<p> \u3000\u3000<\/p>\n\n\n\n<p><strong>2. InnoDB\u5b58\u50a8\u5f15\u64ce \u7684 \u7d22\u5f15 \u9650\u5236<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>InnoDB\u5b58\u50a8\u5f15\u64ce \u662f MySQL &nbsp;\u6700\u5e38\u7528\u7684\u5b58\u50a8\u5f15\u64ce\uff0cInnoDB &nbsp;\u4f5c\u4e3aMySQL5.5\u540e\u7684\u9ed8\u8ba4\u5f15\u64ce\uff0cInnoDB\u652f\u6301\u4e8b\u52a1\u3001\u884c\u7ea7\u9501\u3001\u5916\u952e\u7ea6\u675f\u7b49\u9ad8\u7ea7\u529f\u80fd\u3002InnoDB &nbsp; \u7684\u7d22\u5f15\u91c7\u7528\u805a\u7c07\u7d22\u5f15\uff08\u4e3b\u952e\u7d22\u5f15\uff09 &nbsp;+ &nbsp;\u975e\u805a\u7c07\u7d22\u5f15 \uff08\u4e8c\u7ea7\u7d22\u5f15\uff09 \u7ed3\u5408\u7684\u7ed3\u6784\uff0c\u4e3b\u952e\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u76f4\u63a5\u5b58\u50a8\u884c\u6570\u636e\uff0c\u8fd9\u4f7f\u5f97\u4e3b\u952e\u67e5\u8be2\u7279\u522b\u9ad8\u6548\u3002InnoDB\u8fd8\u652f\u6301MVCC\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u5e76\u53d1\u8bfb\u5199\u6027\u80fd\u3002\u5bf9\u4e8e\u5927\u591a\u6570\u4e1a\u52a1\u573a\u666f\uff0cInnoDB\u90fd\u662f\u6700\u4f73\u9009\u62e9\u3002InnoDB\u662fMySQL\u6700\u5e38\u7528\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u5b83\u5c31\u50cf\u4e00\u8f86\u9ad8\u6027\u80fd\u8dd1\u8f66\uff0c\u65e2\u7a33\u5b9a\u53c8\u5feb\u901f\u3002InnoDB\u5b58\u50a8\u5f15\u64ce &nbsp;\u7d22\u5f15\u6570\u91cf\u9650\u5236<\/p>\n\n\n\n<ul>\n<li>\u6700\u591a64\u4e2a\u666e\u901a\u7d22\u5f15 + 1\u4e2a\u4e3b\u952e\u7d22\u5f15 = 65\u4e2a<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u7d22\u5f15\u6700\u591a\u5305\u542b16\u4e2a\u5b57\u6bb5<\/li>\n<\/ul>\n\n\n\n<p>\u5c3c\u6069\u5bf9\u7d22\u5f15 \u4f7f\u7528\u5efa\u8bae\uff1a<\/p>\n\n\n\n<ul>\n<li>\u867d\u7136\u80fd\u521b\u5efa 65\u4e2a\uff0c\u9664\u975e\u8feb\u4e0d\u5f97\u5df2\uff0c\u4e0d\u5efa\u8bae\u8fd9\u4e48\u5e72\uff01<\/li>\n\n\n\n<li>\u5c31\u6bd4\u5982\u8bf4\uff0c\u50cf\u4e00\u4e2a\u4eba\u80fd\u540310\u7897\u996d\uff0c\u4e0d\u4ee3\u8868\u5c31\u4e00\u5b9a\u8981\u540310\u7897\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>2.1 InnoDB \u7d22\u5f15 \u7684 \u6570\u91cf\u9650\u5236<\/strong><\/p>\n\n\n\n<p>\u6839\u636eMySQL\u5b98\u65b9\u6587\u6863\uff0c InnoDB\u5b58\u50a8\u5f15\u64ce &nbsp;\u5b83\u6700\u591a\u5141\u8bb8 \u4e00\u4e2a\u8868\u6700\u591a &nbsp; 64\u4e2a\u4e8c\u7ea7\u7d22\u5f15\uff08\u5373\u975e\u4e3b\u952e\u7d22\u5f15\uff09\uff0c\u5b98\u65b9\u6587\u6863\u6709\u8bf4\u660e \u5982\u4e0b<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"781\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-1024x781.png\" alt=\"\" class=\"wp-image-18619\" style=\"width:482px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-1024x781.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-300x229.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-768x586.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-830x633.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-230x175.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-350x267.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1-480x366.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-1.png 1162w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>InnoDB\u6700\u591a\u5141\u8bb864\u4e2a\u4e8c\u7ea7\u7d22\u5f15\uff08\u975e\u4e3b\u952e\u7d22\u5f15\uff09\uff0c \u5f53\u7136\uff0c \u8fd8\u6709 \u52a0\u4e0a1\u4e2a\u4e3b\u952e\u7d22\u5f15\uff0c\u603b\u517165\u4e2a\u7d22\u5f15\u3002\u90a3\u5728InnoDB\u4e2d\uff0c\u4e00\u4e2a\u8868\uff0c\u6700\u591a\u53ef\u4ee5\u6709 64+1=<strong>65<\/strong>&nbsp;\u4e2a\u7d22\u5f15\u800c\u5bf9\u4e8e\u4e00\u4e2a\u7d22\u5f15\uff0c\u6700\u591a\u6709\u591a\u5c11\u5217\u5462\uff1f<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>2.2 &nbsp; &nbsp;InnoDB &nbsp; \u7d22\u5f15\u5217 \u7684 \u6570\u91cf\u9650\u5236<\/strong><\/p>\n\n\n\n<p>InnoDB &nbsp;\u4e2d\uff0c\u4e00\u4e2a \u7d22\u5f15 &nbsp;\u6700\u591a \u80fd\u5141\u8bb8 &nbsp;\u591a\u5c11\u4e2a \u5217 \uff1f\u7ed3\u8bba\u662f\uff1a \u4e00\u4e2a \u7d22\u5f15 &nbsp; \u6700\u591a\u662f16\u5217\u3002\u5b98\u65b9\u6587\u6863\u4e5f\u662f\u6709\u8bf4\u660e\u7684\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"686\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-1024x686.png\" alt=\"\" class=\"wp-image-18621\" style=\"width:514px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-1024x686.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-300x201.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-768x515.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-830x556.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-230x154.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-350x235.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3-480x322.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-3.png 1158w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u6bcf\u4e2a\u7d22\u5f15\u6700\u591a\u53ef\u4ee5\u5305\u542b16\u4e2a\u5b57\u6bb5\uff0c\u8fd9\u610f\u5473\uff0c &nbsp;\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u5305\u542b16\u4e2a\u5b57\u6bb5\u7684\u8d85\u7ea7\u8054\u5408\u7d22\u5f15\u3002\u4f46\u8981\u6ce8\u610f\uff0c\u8fd9\u4e9b\u662f\u7406\u8bba\u6700\u5927\u503c\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\u5e94\u8be5\u8fdc\u4f4e\u4e8e\u8fd9\u4e2a\u9650\u5236\u3002\u7d22\u5f15\u8d8a\u591a\uff0c\u6216\u8005\u4e00\u4e2a\u7d22\u5f15\u91cc\u8fb9\u7684 \u5217\u8d8a\u591a\uff0c &nbsp;\u7ef4\u62a4\u6210\u672c\u8d8a\u9ad8\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u5199\u5165\u9891\u7e41\u7684\u8868\uff0c\u8fc7\u591a\u7684\u7d22\u5f15\u4f1a\u4e25\u91cd\u5f71\u54cd\u6027\u80fd\u3002\u901a\u5e38\u5efa\u8bae\u5355\u8868\u7d22\u5f15\u4e0d\u8d85\u8fc75-8\u4e2a\uff0c\u6838\u5fc3\u67e5\u8be2\u5b57\u6bb5\u4f18\u5148\u5efa\u7d22\u5f15\u3002\u5bf9\u4e8e\u8054\u5408\u7d22\u5f15\uff0c\u5b57\u6bb5\u6570\u6700\u597d\u63a7\u5236\u57283-5\u4e2a\u4ee5\u5185\u3002\u5efa\u8bae\u662f \uff1a &nbsp;\u5b9a\u671f\u4f7f\u7528EXPLAIN\u5206\u6790\u67e5\u8be2\u8bed\u53e5\uff0c\u786e\u4fdd\u7d22\u5f15\u88ab\u6b63\u786e\u4f7f\u7528\uff0c\u5220\u9664\u5197\u4f59\u548c\u4f4e\u6548\u7684\u7d22\u5f15\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>3. MyISAM\u5b58\u50a8\u5f15\u64ce &nbsp;\u7684 \u7d22\u5f15 \u9650\u5236<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>MyISAM \u662f MySQL\u65e9\u671f\u7684\u9ed8\u8ba4\u5b58\u50a8\u5f15\u64ce\uff0c\u867d\u7136\u73b0\u5728\u7528\u5f97\u5c11\u4e86\uff0c\u4f46\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\u4ecd\u6709\u4ef7\u503c\u3002MyISAM &nbsp;\u9002\u5408\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f\u3002MyISAM \u4e0d\u652f\u6301\u4e8b\u52a1\u548c\u884c\u7ea7\u9501\uff0c\u4f46\u67e5\u8be2\u901f\u5ea6\u975e\u5e38\u5feb\uff0c\u7279\u522b\u9002\u5408\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u63d0\u793a\uff1aMyISAM\u7684\u8868\u7ea7\u9501\u5728\u5199\u5165\u65f6\u4f1a\u9501\u5b9a\u6574\u4e2a\u8868\uff0c\u4e0d\u9002\u5408\u9ad8\u5e76\u53d1\u5199\u5165\u573a\u666f\u3002<br><\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>3.1 \u7d22\u5f15\u6570\u91cf\u9650\u5236<\/strong><\/p>\n\n\n\n<p>MyISAM\u6bcf\u4e2a\u8868\u6700\u591a\u652f\u630164\u4e2a\u7d22\u5f15\uff0c\u4e3b\u952e\u7d22\u5f15\u4e0d\u8ba1\u5165\u6b64\u9650\u5236\u3002\u6bcf\u4e2a\u7d22\u5f15\u6700\u591a\u53ef\u4ee5\u5305\u542b16\u4e2a\u5b57\u6bb5\uff0c\u4e0eInnoDB\u76f8\u540c\u3002MyISAM\u7684\u7d22\u5f15\u4f7f\u7528B-tree\u7ed3\u6784\u5b58\u50a8\uff0c\u652f\u6301\u524d\u7f00\u7d22\u5f15\uff0c\u53ef\u4ee5\u53ea\u5bf9\u5b57\u6bb5\u7684\u524dN\u4e2a\u5b57\u7b26\u5efa\u7acb\u7d22\u5f15\u3002MyISAM\u5b58\u50a8\u5f15\u64ce &nbsp;\u7684 \u7d22\u5f15 \u9650\u5236 \u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul>\n<li>\u6700\u591a64\u4e2a\u7d22\u5f15\uff08\u4e3b\u952e\u4e0d\u7b97\u5728\u5185\uff09<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u7d22\u5f15\u6700\u591a16\u4e2a\u5b57\u6bb5<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>3.2 MyISAM \u4e0eInnoDB\u7684\u533a\u522b<\/strong><\/p>\n\n\n\n<p>MyISAM\u548cInnoDB\u7684\u4e3b\u8981\u533a\u522b\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul>\n<li>MyISAM \u4e0d\u652f\u6301\u4e8b\u52a1<\/li>\n\n\n\n<li>MyISAM \u8868\u7ea7\u9501\uff08\u4e0d\u662f\u884c\u7ea7\u9501\uff09<\/li>\n\n\n\n<li>MyISAM &nbsp;\u9002\u5408\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f<\/li>\n<\/ul>\n\n\n\n<p>MyISAM\u4e0d\u652f\u6301\u4e8b\u52a1\uff0c\u800cInnoDB\u652f\u6301\uff1bMyISAM\u53ea\u6709\u8868\u7ea7\u9501\uff0cInnoDB\u652f\u6301\u884c\u7ea7\u9501\uff1bMyISAM\u4e0d\u652f\u6301\u5916\u952e\uff0cInnoDB\u652f\u6301\uff1bMyISAM\u7684\u5d29\u6e83\u6062\u590d\u80fd\u529b\u8f83\u5f31\uff0cInnoDB\u66f4\u53ef\u9760\uff1bMyISAM\u7684\u5168\u6587\u7d22\u5f15\u8f83\u65e9\u51fa\u73b0\uff0c\u4f46\u73b0\u5728InnoDB\u4e5f\u652f\u6301\u4e86\u3002\u9009\u62e9\u5b58\u50a8\u5f15\u64ce\u65f6\uff0c\u5982\u679c\u4e0d\u9700\u8981\u4e8b\u52a1\u4e14\u8bfb\u591a\u5199\u5c11\uff0c\u53ef\u4ee5\u8003\u8651MyISAM\uff0c\u5426\u5219\u5e94\u8be5\u9009\u62e9InnoDB\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>4. \u7d22\u5f15\u6570\u91cf\uff1a\u5c11\u5373\u662f\u591a<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\uff0c\u7d22\u5f15\u6570\u91cf\u5e94\u8be5\u9075\u5faa&#8221;\u5c11\u5373\u662f\u591a&#8221;\u7684\u539f\u5219\u3002\u8fc7\u591a\u7684\u7d22\u5f15\u4e0d\u4ec5\u4e0d\u80fd\u63d0\u9ad8\u6027\u80fd\uff0c\u53cd\u800c\u4f1a\u5e26\u6765\u5404\u79cd\u95ee\u9898\u3002\u7d22\u5f15\u5c31\u50cf\u4e66\u4e2d\u7684\u76ee\u5f55\uff0c\u4e00\u672c\u51e0\u767e\u9875\u7684\u4e66\u67093-5\u4e2a\u76ee\u5f55\u7ae0\u8282\u5c31\u8db3\u591f\u4e86\uff0c\u5982\u679c\u6bcf\u9875\u90fd\u505a\u4e00\u4e2a\u76ee\u5f55\uff0c\u53cd\u800c\u4f1a\u8ba9\u67e5\u627e\u53d8\u5f97\u56f0\u96be\u3002\u6570\u636e\u5e93\u7d22\u5f15\u4e5f\u662f\u5982\u6b64\uff0c\u9700\u8981\u7cbe\u5fc3\u8bbe\u8ba1\uff0c\u53ea\u7ed9\u771f\u6b63\u9700\u8981\u7684\u67e5\u8be2\u6761\u4ef6\u5efa\u7acb\u7d22\u5f15\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>4.1 \u963f\u91cc\u5df4\u5df4\u89c4\u8303\u5efa\u8bae<\/strong><\/p>\n\n\n\n<p>\u65e5\u5e38\u5f00\u53d1\u4e2d\uff0c\u4e00\u4e2a\u8868\u8bbe\u8ba1\u591a\u5c11\u4e2a\u7d22\u5f15\u5408\u9002\u5462\uff1f<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u963f\u91cc\u5df4\u5df4\u300aJava\u5f00\u53d1\u624b\u518c\u300b\u6280\u672f\u6587\u6863\uff0c\u5355\u8868\u7d22\u5f15\u6570\u91cf\u5efa\u8bae\u63a7\u5236\u57285\u4e2a\u4ee5\u5185, \u5355\u4e2a\u7d22\u5f15\u7684\u5b57\u6bb5\u6570\u4e0d\u8d85\u8fc75\u4e2a<\/pre>\n\n\n\n<p>\u963f\u91cc\u5df4\u5df4\u300aJava\u5f00\u53d1\u624b\u518c\u300b\u5efa\u8bae\u5355\u8868\u7d22\u5f15\u6570\u91cf\u63a7\u5236\u57285\u4e2a\u4ee5\u5185\uff0c\u8fd9\u662f\u57fa\u4e8e\u591a\u5e74\u5b9e\u6218\u7ecf\u9a8c\u5f97\u51fa\u7684\u7ed3\u8bba\u30025\u4e2a\u7d22\u5f15\u5bf9\u4e8e\u5927\u591a\u6570\u4e1a\u52a1\u573a\u666f\u5df2\u7ecf\u8db3\u591f\uff0c\u80fd\u591f\u8986\u76d6\u4e3b\u8981\u7684\u67e5\u8be2\u9700\u6c42\u3002\u8fd9\u4e2a\u5efa\u8bae\u4e0d\u662f\u7edd\u5bf9\u7684\uff0c\u5bf9\u4e8e\u7279\u522b\u590d\u6742\u7684\u4e1a\u52a1\u8868\u53ef\u4ee5\u9002\u5f53\u589e\u52a0\uff0c\u4f46\u5fc5\u987b\u6709\u5145\u5206\u7684\u7406\u7531\u3002\u89c4\u8303\u8fd8\u5efa\u8bae\u5355\u4e2a\u7d22\u5f15\u7684\u5b57\u6bb5\u6570\u4e0d\u8d85\u8fc75\u4e2a\uff0c\u907f\u514d\u521b\u5efa\u8fc7\u4e8e\u590d\u6742\u7684\u8054\u5408\u7d22\u5f15\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u603b\u4e4b\uff1a \u9002\u5f53\u7684\u7d22\u5f15\u80fd\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u8fc7\u591a\u7684\u7d22\u5f15\u4f1a\u5f71\u54cd\u6570\u636e\u5e93\u8868\u7684\u63d2\u5165\u548c\u66f4\u65b0\u529f\u80fd\u3002<\/pre>\n\n\n\n<p>\u6709\u4e9b\u65f6\u5019\uff0c\u4e0d\u52a0\u7d22\u5f15\u66f4\u5408\u9002\uff1a<\/p>\n\n\n\n<ul>\n<li>\u6570\u636e\u91cf\u5c11\u7684\u8868\uff0c\u4e0d\u9002\u5408\u52a0\u7d22\u5f15<\/li>\n\n\n\n<li>\u66f4\u65b0\u6bd4\u8f83\u9891\u7e41\u7684\u4e5f\u4e0d\u9002\u5408\u52a0\u7d22\u5f15<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>4.2 \u4e3a\u4ec0\u4e48 \u963f\u91cc\u5df4\u5df4\u89c4\u8303\u5efa\u8bae \u662f5\u4e2a\uff1f<\/strong><\/p>\n\n\n\n<p>\u963f\u91cc\u5df4\u5df4\u7684\u300aJava\u5f00\u53d1\u624b\u518c\u300b\u5efa\u8bae\u5355\u8868\u7d22\u5f15\u4e0d\u8d85\u8fc75\u4e2a\uff0c\u4e3a\u5565\u5462\uff1f\u56e0\u4e3a\uff0c\u7d22\u5f15 &nbsp;\u592a\u591a\u7684 &nbsp;&#8220;\u526f\u4f5c\u7528&#8221; &nbsp;\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u5199\u6570\u636e\u53d8\u6162<\/strong>\u200c\uff1a\u5c31\u50cf\u4f60\u6bcf\u5199\u4e00\u7bc7\u65e5\u8bb0\uff0c\u90fd\u8981\u572810\u4e2a\u4e0d\u540c\u7684\u76ee\u5f55\u91cc\u66f4\u65b0\u4f4d\u7f6e\uff0c\u7d2f\u4e0d\u7d2f\uff1f<\/li>\n\n\n\n<li><strong>\u5360\u7528\u7a7a\u95f4\u5927<\/strong>\u200c\uff1a\u6bcf\u4e2a\u7d22\u5f15\u90fd\u8981\u5355\u72ec\u5b58\u4e00\u4efd\u6570\u636e\uff0c\u5c31\u50cf\u4f60\u4e3a\u4e86\u627e\u4e66\u65b9\u4fbf\uff0c\u4e70\u4e8610\u672c\u4e00\u6a21\u4e00\u6837\u7684\u5b57\u5178\u653e\u5bb6\u91cc<\/li>\n\n\n\n<li><strong>MySQL\u4f1a\u72af\u9009\u62e9\u56f0\u96be\u75c7<\/strong>\u200c\uff1a\u7d22\u5f15\u592a\u591a\uff0cMySQL\u53cd\u800c\u53ef\u80fd\u9009\u9519\u6700\u5feb\u7684\u67e5\u8be2\u8def\u5f84<\/li>\n\n\n\n<li><strong>\u7ef4\u62a4\u6210\u672c\u9ad8<\/strong>\u200c\uff1a\u5907\u4efd\u3001\u8fc1\u79fb\u6570\u636e\u65f6\uff0c\u7d22\u5f15\u8d8a\u591a\u8d8a\u6162<\/li>\n<\/ul>\n\n\n\n<p>\u6240\u4ee5\uff0c\u73b0\u5b9e\u4e2d\u7684\u6700\u4f73\u5b9e\u8df5\uff1a &nbsp;<strong>5\u4e2a\u4ee5\u5185\u6700\u5065\u5eb7\u3002<\/strong><\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>5. \u7d22\u5f15\u8fc7\u591a\u4f1a \u5bfc\u81f4\u7684 &nbsp;&#8220;\u4e03\u5b97\u7f6a&#8221;<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u7d22\u5f15\u867d\u7136\u80fd\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\uff0c\u4f46\u8fc7\u591a\u7d22\u5f15\u4f1a\u5e26\u6765\u4e00\u7cfb\u5217\u95ee\u9898\uff0c\u8fc7\u5ea6\u7d22\u5f15\u5e26\u6765\u7684\u6027\u80fd\u4e0b\u964d\u548c\u7ef4\u62a4\u56f0\u96be \uff0c \u8fd9\u91cc \u603b\u7ed3\u4e3a\u7d22\u5f15\u7684&#8221;\u4e03\u5b97\u7f6a&#8221;\u3002\u7406\u89e3 &#8220;\u4e03\u5b97\u7f6a&#8221; \u95ee\u9898\uff0c\u6709\u52a9\u4e8e\u6211\u4eec\u66f4\u597d\u5730\u8bbe\u8ba1\u7d22\u5f15\u7b56\u7565\uff0c\u907f\u514d\u8fc7\u5ea6\u7d22\u5f15\u5e26\u6765\u7684\u6027\u80fd\u4e0b\u964d\u548c\u7ef4\u62a4\u56f0\u96be\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>5.1 \u7b2c\u4e00\u5b97\u7f6a\uff1a\u5199\u5165\u53d8\u6162<\/strong><\/p>\n\n\n\n<p>\u6bcf\u6b21\u6267\u884cINSERT\u3001UPDATE\u3001DELETE\u64cd\u4f5c\u65f6\uff0cMySQL\u4e0d\u4ec5\u8981\u4fee\u6539\u6570\u636e\uff0c\u8fd8\u8981\u66f4\u65b0\u6240\u6709\u76f8\u5173\u7684\u7d22\u5f15\u3002\u7d22\u5f15\u8d8a\u591a\uff0c\u5199\u5165\u64cd\u4f5c\u5c31\u8d8a\u6162\u3002\u7279\u522b\u662f\u5728\u6279\u91cf\u5bfc\u5165\u6570\u636e\u65f6\uff0c\u7d22\u5f15\u4f1a\u663e\u8457\u964d\u4f4e\u5bfc\u5165\u901f\u5ea6\u3002\u6d4b\u8bd5\u8868\u660e\uff0c\u4e00\u4e2a\u6ca1\u6709\u7d22\u5f15\u7684\u8868\u53ef\u80fd\u6bd4\u670910\u4e2a\u7d22\u5f15\u7684\u8868\u5199\u5165\u901f\u5ea6\u5feb10\u500d\u4ee5\u4e0a\u3002\u5bf9\u4e8e\u5728\u7ebfweb\u670d\u52a1\u7cfb\u7edf\uff08\u5982\u7535\u5546\u5e73\u53f0\u3001 \u91d1\u878d\u4ea4\u6613\u5e73\u53f0\uff09\uff0c\u8fc7\u591a\u7684\u7d22\u5f15\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u541e\u5410\u91cf\u5927\u5e45\u4e0b\u964d\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>5.2 \u7b2c\u4e8c\u5b97\u7f6a\uff1a\u78c1\u76d8 \u7a7a\u95f4\u6d6a\u8d39<\/strong><\/p>\n\n\n\n<p><strong>\u5360\u7528\u7a7a\u95f4\u5927<\/strong>\u200c\uff1a\u6bcf\u4e2a\u7d22\u5f15\u90fd\u8981\u5355\u72ec\u5b58\u4e00\u4efd\u6570\u636e\uff0c\u5c31\u50cf\u4f60\u4e3a\u4e86\u627e\u4e66\u65b9\u4fbf\uff0c\u4e70\u4e8610\u672c\u4e00\u6a21\u4e00\u6837\u7684\u5b57\u5178\u653e\u5bb6\u91cc\u6bcf\u4e2a\u7d22\u5f15\u90fd\u9700\u8981\u989d\u5916\u7684 &nbsp;\u78c1\u76d8 \u5b58\u50a8\u7a7a\u95f4\u3002\u5bf9\u4e8eInnoDB\uff0c\u7d22\u5f15\u548c\u6570\u636e\u5b58\u50a8\u5728\u540c\u4e00\u4e2a\u6587\u4ef6\u4e2d\uff0c\u7d22\u5f15\u8d8a\u591a\uff0c\u6587\u4ef6\u8d8a\u5927\u3002\u4e00\u4e2a\u5305\u542b10\u4e2a\u7d22\u5f15\u7684\u767e\u4e07\u7ea7\u6570\u636e\u8868\uff0c\u7d22\u5f15\u53ef\u80fd\u5360\u7528\u51e0GB\u751a\u81f3\u66f4\u591a\u7684\u7a7a\u95f4\u3002\u8fd9\u4e0d\u4ec5\u589e\u52a0\u4e86\u5b58\u50a8\u6210\u672c\uff0c\u8fd8\u4f1a\u5f71\u54cd\u5907\u4efd\u6062\u590d\u7684\u901f\u5ea6\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>5.3 &nbsp;\u7b2c\u4e09\u5b97\u7f6a\uff1a\u7f13\u5b58\u6548\u7387\u964d\u4f4e<\/strong><\/p>\n\n\n\n<p>InnoDB\u4f7f\u7528 Buffer Pool \u7f13\u51b2\u6c60\u6765\u7f13\u5b58\u6570\u636e\u548c\u7d22\u5f15\u3002\u7d22\u5f15\u592a\u591a\u4f1a\u5360\u7528\u5927\u91cf Buffer Pool &nbsp;\u7f13\u51b2\u6c60\u7a7a\u95f4\uff0c\u5bfc\u81f4\u6570\u636e\u548c\u7d22\u5f15\u7684\u7f13\u5b58\u547d\u4e2d\u7387\u4e0b\u964d\u3002\u5f53 Buffer Pool &nbsp;\u7f13\u51b2\u6c60\u65e0\u6cd5\u5bb9\u7eb3\u5e38\u7528\u6570\u636e\u65f6\uff0cMySQL\u5c31\u9700\u8981\u9891\u7e41\u5730\u4ece\u78c1\u76d8\u8bfb\u53d6\u6570\u636e\uff0c\u4e25\u91cd\u5f71\u54cd\u6027\u80fd\u3002\u5408\u7406\u7684\u7d22\u5f15\u6570\u91cf\u53ef\u4ee5\u8ba9\u7f13\u51b2\u6c60\u7f13\u5b58\u66f4\u591a\u70ed\u70b9\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>5.4 &nbsp;\u7b2c4\u5b97\u7f6a\uff1a\u9501\u7ade\u4e89\u52a0\u5267<\/strong><\/p>\n\n\n\n<p>\u5728\u9ad8\u5e76\u53d1\u73af\u5883\u4e0b\uff0c\u7d22\u5f15\u66f4\u65b0\u4f1a\u5bfc\u81f4\u9501\u7ade\u4e89\u52a0\u5267\u3002\u7279\u522b\u662f\u5f53\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u4fee\u6539\u540c\u4e00\u7d22\u5f15\u65f6\uff0c\u53ef\u80fd\u51fa\u73b0\u9501\u7b49\u5f85\u751a\u81f3\u6b7b\u9501\u3002InnoDB\u7684\u884c\u7ea7\u9501\u867d\u7136\u7f13\u89e3\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u7d22\u5f15\u592a\u591a\u4ecd\u7136\u4f1a\u589e\u52a0\u9501\u51b2\u7a81\u7684\u6982\u7387\uff0c\u5f71\u54cd\u7cfb\u7edf\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>5.5 &nbsp;\u7b2c5\u5b97\u7f6a\uff1a\u4f18\u5316\u5668\u56f0\u60d1<\/strong><\/p>\n\n\n\n<p><strong>MySQL\u4f1a\u72af\u9009\u62e9\u56f0\u96be\u75c7<\/strong>\u200c\uff1a\u7d22\u5f15\u592a\u591a\uff0cMySQL\u53cd\u800c\u53ef\u80fd\u9009\u9519\u6700\u5feb\u7684\u67e5\u8be2\u8def\u5f84\u5f53\u8868\u4e2d\u6709\u591a\u4e2a\u7d22\u5f15\u65f6\uff0cMySQL\u4f18\u5316\u5668\u9700\u8981\u9009\u62e9\u4f7f\u7528\u54ea\u4e2a\u7d22\u5f15\u6765\u6267\u884c\u67e5\u8be2\u3002\u7d22\u5f15\u592a\u591a\u4f1a\u589e\u52a0\u4f18\u5316\u5668\u505a\u51fa\u9519\u8bef\u9009\u62e9\u7684\u98ce\u9669\uff0c\u53ef\u80fd\u5bfc\u81f4\u6027\u80fd\u53cd\u800c\u4e0b\u964d\u3002\u6bd4\u5982\u4f18\u5316\u5668\u53ef\u80fd\u9009\u62e9\u533a\u5206\u5ea6\u4e0d\u9ad8\u7684\u7d22\u5f15\uff0c\u6216\u8005\u9519\u8bef\u4f30\u8ba1\u7d22\u5f15\u7684\u9009\u62e9\u6027\u3002\u8fd9\u65f6\u5c31\u9700\u8981\u4f7f\u7528FORCE INDEX\u7b49\u63d0\u793a\u6765\u5f3a\u5236\u4f7f\u7528\u7279\u5b9a\u7d22\u5f15\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>5.6 &nbsp;\u7b2c6\u5b97\u7f6a\uff1a\u7ef4\u62a4\u56f0\u96be<\/strong><\/p>\n\n\n\n<p>\u7d22\u5f15\u8d8a\u591a\uff0c\u6570\u636e\u5e93\u7ef4\u62a4\u5de5\u4f5c\u5c31\u8d8a\u590d\u6742\u3002ALTER TABLE\u64cd\u4f5c\u4f1a\u53d8\u5f97\u66f4\u6162\uff0c\u7279\u522b\u662f\u5728\u5927\u8868\u4e0a\u6dfb\u52a0\u6216\u5220\u9664\u7d22\u5f15\u53ef\u80fd\u9700\u8981\u5f88\u957f\u65f6\u95f4\u3002\u5907\u4efd\u6062\u590d\u4e5f\u4f1a\u53d8\u6162\uff0c\u56e0\u4e3a\u9700\u8981\u5904\u7406\u66f4\u591a\u7684\u7d22\u5f15\u6570\u636e\u3002\u6b64\u5916\uff0c\u76d1\u63a7\u548c\u7ba1\u7406\u5927\u91cf\u7d22\u5f15\u4e5f\u9700\u8981\u66f4\u591a\u7684\u65f6\u95f4\u548c\u7cbe\u529b\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>5.7 &nbsp;\u7b2c7\u5b97\u7f6a\uff1a\u7edf\u8ba1\u4fe1\u606f\u66f4\u65b0\u53d8\u6162<\/strong><\/p>\n\n\n\n<p>MySQL\u4f7f\u7528\u7edf\u8ba1\u4fe1\u606f\u6765\u4f18\u5316\u67e5\u8be2\u6267\u884c\u8ba1\u5212\u3002\u7d22\u5f15\u8d8a\u591a\uff0c\u6536\u96c6\u548c\u7ef4\u62a4\u7edf\u8ba1\u4fe1\u606f\u6240\u9700\u7684\u65f6\u95f4\u548c\u8d44\u6e90\u5c31\u8d8a\u591a\u3002\u5728\u6570\u636e\u53d8\u5316\u9891\u7e41\u7684\u8868\u4e0a\uff0c\u8fc7\u65f6\u7684\u7edf\u8ba1\u4fe1\u606f\u53ef\u80fd\u5bfc\u81f4\u4f18\u5316\u5668\u9009\u62e9\u4f4e\u6548\u7684\u6267\u884c\u8ba1\u5212\u3002\u867d\u7136\u53ef\u4ee5\u624b\u52a8\u5206\u6790\u8868\u6765\u66f4\u65b0\u7edf\u8ba1\u4fe1\u606f\uff0c\u4f46\u8fd9\u4f1a\u589e\u52a0\u7ef4\u62a4\u8d1f\u62c5\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>6. \u7d22\u5f15\u4f7f\u7528\u5b9e\u6218\u6280\u5de7<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u638c\u63e1\u4e86\u7d22\u5f15\u7684\u57fa\u672c\u539f\u7406\u540e\uff0c\u5efa\u8bae\u5927\u5bb6 \u9700\u8981\u4e86\u89e3\u4e00\u4e9b\u7d22\u5f15\u7684\u5b9e\u6218\u6280\u5de7\uff0c \u5e2e\u52a9\u6211\u4eec\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u66f4\u597d\u5730\u8bbe\u8ba1\u548c\u4f7f\u7528\u7d22\u5f15\u3002\u5927\u5bb6\u5bf9\u4e8e \u7d22\u5f15\u7684\u4f7f\u7528\uff0c\u5b58\u5728\u5f88\u591a\u8bef\u533a\uff0c\u5176\u4e2d &nbsp;\u6700\u5927\u7684\u8bef\u533a\u662f\u8ba4\u4e3a&#8221;\u7d22\u5f15\u8d8a\u591a\u67e5\u8be2\u8d8a\u5feb&#8221;\uff0c\u5b9e\u9645\u4e0a\u7d22\u5f15\u8fc7\u591a\u4f1a\u964d\u4f4e\u6574\u4f53\u6027\u80fd\u3002\u53e6\u4e00\u4e2a\u8bef\u533a\u662f\u4e3a\u6240\u6709\u67e5\u8be2\u5b57\u6bb5\u90fd\u5efa\u7d22\u5f15\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u7d22\u5f15\u6cdb\u6ee5\u3002\u8fd8\u6709\u4eba\u8ba4\u4e3a\u8054\u5408\u7d22\u5f15\u5b57\u6bb5\u987a\u5e8f\u65e0\u5173\u7d27\u8981\uff0c\u5b9e\u9645\u4e0a\u987a\u5e8f\u5bf9\u7d22\u5f15\u6548\u7387\u5f71\u54cd\u5f88\u5927\u3002\u6b64\u5916\uff0c\u8fc7\u5ea6\u4f9d\u8d56\u81ea\u52a8\u521b\u5efa\u7684\u7d22\u5f15\u3001\u4e0d\u8bc4\u4f30\u7d22\u5f15\u4f7f\u7528\u6548\u679c\u3001\u4e0d\u5220\u9664\u65e0\u7528\u7d22\u5f15\u7b49\u90fd\u662f\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>6.1 \u54ea\u4e9b\u60c5\u51b5\u4e0d\u52a0\u7d22\u5f15\uff1f<\/strong><\/p>\n\n\n\n<ul>\n<li>\u7b2c\u4e00\uff1a\u6570\u636e\u91cf\u5c0f\u7684\u8868\uff08\u5982\u914d\u7f6e\u8868\uff09\u4e0d\u9700\u8981\u7d22\u5f15\u3002\u4e3a\u5565\u5462 &nbsp;\uff1f &nbsp;\u56e0\u4e3a\u6570\u636e\u91cf\u5c0f\u7684\u8868 \u5728\u67e5\u8be2\u7684\u65f6\u5019\uff0c \u5168\u8868\u626b\u63cf\u53ef\u80fd\u6bd4\u7d22\u5f15\u67e5\u627e\u66f4\u5feb\u3002<\/li>\n\n\n\n<li>\u7b2c\u4e8c\uff1a\u9891\u7e41\u66f4\u65b0\u7684\u5b57\u6bb5\uff08\u5199\u591a\u8bfb\u5c11\u7684\u5b57\u6bb5\uff09\uff0c\u8981\u8c28\u614e\u52a0\u7d22\u5f15\u3002\u4e3a\u5565\u5462 &nbsp;\uff1f \u56e0\u4e3a\u6bcf\u6b21\u66f4\u65b0\u90fd\u9700\u8981\u7ef4\u62a4\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u7b2c\u4e09\uff1a\u533a\u5206\u5ea6\u4f4e\u7684\u5b57\u6bb5\uff08\u5982\u6027\u522b\u3001\u72b6\u6001\u6807\u5fd7\uff09\uff0c\u901a\u5e38\u4e0d\u9002\u5408\u5355\u72ec\u5efa\u7d22\u5f15\u3002\u4e3a\u5565\u5462 &nbsp;\uff1f\u56e0\u4e3a\u7d22\u5f15\u6548\u679c\u4e0d\u660e\u663e\u3002<\/li>\n\n\n\n<li>\u7b2c\u56db\uff1a\u592a\u957f\u7684\u5b57\u6bb5\uff08\u5982TEXT\uff09\u4e0d\u8981\u52a0\u7d22\u5f15\u3002\u5982\u679c\u4e00\u5b9a\u8981\u52a0\uff0c\u5c31\u8981\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u7b2c\u4e94\uff1a NULL\u503c\u8fc7\u591a\u7684\u5b57\u6bb5\uff0c\u4e5f\u4e0d\u5efa\u8bae \u52a0\u7d22\u5f15\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>6.2 \u5982\u4f55\u8bbe\u8ba1\u9ad8\u6548\u7d22\u5f15\uff1f<\/strong><\/p>\n\n\n\n<ul>\n<li>\u9996\u5148\u5206\u6790\u4e1a\u52a1\u67e5\u8be2\u6a21\u5f0f\uff0c\u4f18\u5148\u4e3a\u9ad8\u9891\u67e5\u8be2\u6761\u4ef6\u5efa\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u8054\u5408\u7d22\u5f15\u8981\u6ce8\u610f\u5b57\u6bb5\u987a\u5e8f\uff0c\u533a\u5206\u5ea6\u9ad8\u7684\u5b57\u6bb5\u653e\u524d\u9762\u3002<\/li>\n\n\n\n<li>\u907f\u514d\u521b\u5efa\u5197\u4f59\u7d22\u5f15\uff0c\u6bd4\u5982\u5df2\u6709(a,b)\u7d22\u5f15\u5c31\u4e0d\u9700\u8981\u5355\u72ec\u5efaa\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u5b9a\u671f\u4f7f\u7528EXPLAIN\u5206\u6790\u6162\u67e5\u8be2\uff0c\u4f18\u5316\u7d22\u5f15\u7b56\u7565\u3002<\/li>\n\n\n\n<li>\u8003\u8651\u4f7f\u7528\u8986\u76d6\u7d22\u5f15\u51cf\u5c11\u56de\u8868\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li>\u5bf9\u4e8e\u957f\u5b57\u7b26\u4e32\uff0c\u8003\u8651\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\u8282\u7701\u7a7a\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>6.3 \u5bf9 \u7d22\u5f15\u8fdb\u884c \u5b9a\u671f\u76d1\u63a7\u548c\u4f18\u5316<\/strong><\/p>\n\n\n\n<p>\u7d22\u5f15\u4e0d\u662f\u5efa\u5b8c\u5c31\u4e00\u52b3\u6c38\u9038\u7684\uff0c\u9700\u8981\u5b9a\u671f\u76d1\u63a7\u548c\u4f18\u5316\u3002\u5efa\u8bae\u6bcf\u6708\u81f3\u5c11\u68c0\u67e5\u4e00\u6b21\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\uff0c\u5220\u9664\u65e0\u7528\u7d22\u5f15\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u4f7f\u7528SHOW INDEX FROM table\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u8868\u7684\u7d22\u5f15\u4fe1\u606f\uff0c\u5305\u62ec\u7d22\u5f15\u540d\u79f0\u3001\u5b57\u6bb5\u3001\u57fa\u6570\u7b49\u3002<br>\u901a\u8fc7sys.schema_unused_indexes  \u89c6\u56fe\u53ef\u4ee5\u627e\u51fa\u957f\u671f\u672a\u4f7f\u7528\u7684\u7d22\u5f15\u3002<br>EXPLAIN\u547d\u4ee4\u53ef\u4ee5\u5206\u6790\u67e5\u8be2\u662f\u5426\u4f7f\u7528\u4e86\u5408\u9002\u7684\u7d22\u5f15\u3002<\/pre>\n\n\n\n<p>\u5bf9\u4e8e\u6570\u636e\u53d8\u5316\u5927\u7684\u8868\uff0c\u5b9a\u671fANALYZE TABLE\u66f4\u65b0\u7edf\u8ba1\u4fe1\u606f\u3002\u76d1\u63a7\u7d22\u5f15\u788e\u7247\u5316\u7a0b\u5ea6\uff0c\u5fc5\u8981\u65f6\u91cd\u5efa\u7d22\u5f15\u3002\u5efa\u7acb\u7d22\u5f15\u53d8\u66f4\u8bc4\u5ba1\u673a\u5236\uff0c\u907f\u514d\u968f\u610f\u6dfb\u52a0\u7d22\u5f15\u3002\u8bb0\u5f55\u7d22\u5f15\u53d8\u66f4\u5386\u53f2\uff0c\u4fbf\u4e8e\u95ee\u9898\u8ffd\u8e2a\u3002\u5bf9\u4e8e\u91cd\u8981\u7cfb\u7edf\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u7d22\u5f15\u7ba1\u7406\u5de5\u5177\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>7. \u7d22\u5f15\u7684 \u771f\u5b9e\u6848\u4f8b\u5206\u4eab<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u7406\u8bba\u7ed3\u5408\u5b9e\u8df5\u624d\u80fd\u66f4\u597d\u638c\u63e1\u7d22\u5f15\u8bbe\u8ba1\uff0c\u4e0b\u9762\u5206\u4eab\u4e24\u4e2a\u771f\u5b9e\u6848\u4f8b\u3002\u8fd9\u4e9b\u6848\u4f8b\u6765\u81ea\u5b9e\u9645\u9879\u76ee\u7ecf\u9a8c\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u6839\u636e\u5177\u4f53\u4e1a\u52a1\u9700\u6c42\u8bbe\u8ba1\u5408\u7406\u7684\u7d22\u5f15\u7b56\u7565\uff0c\u4ee5\u53ca\u4e0d\u5f53\u7d22\u5f15\u8bbe\u8ba1\u53ef\u80fd\u5bfc\u81f4\u7684\u95ee\u9898\u548c\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u6848\u4f8b1\uff1a\u7535\u5546\u7cfb\u7edf\u7528\u6237\u8868 \u7684\u7d22\u5f15\u6848\u4f8b\u5206\u4eab<\/strong><\/p>\n\n\n\n<p>\u4e3b\u952e\u4f7f\u7528\u81ea\u589euser_id\uff0c\u4fdd\u8bc1\u5199\u5165\u6027\u80fd\u3002mobile\u548cemail\u5b57\u6bb5\u5efa\u7acb\u552f\u4e00\u7d22\u5f15\uff0c\u7528\u4e8e\u767b\u5f55\u548c\u5bc6\u7801\u627e\u56de\u3002register_time\u5efa\u7acb\u7d22\u5f15\u7528\u4e8e\u65b0\u7528\u6237\u5206\u6790\u3002last_login\u5efa\u7acb\u7d22\u5f15\u7528\u4e8e\u6d3b\u8dc3\u7528\u6237\u7edf\u8ba1\u3002nickname\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\u652f\u6301\u6a21\u7cca\u641c\u7d22\u3002\u907f\u514d\u4e3agender\u7b49\u4f4e\u533a\u5206\u5ea6\u5b57\u6bb5\u5355\u72ec\u5efa\u7d22\u5f15\u3002\u5b9a\u671f\u6e05\u7406\u4e0d\u6d3b\u8dc3\u7528\u6237\u7684\u7d22\u5f15\u6761\u76ee\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u6848\u4f8b2\uff1a\u8ba2\u5355\u7cfb\u7edf &nbsp; \u8ba2\u5355\u8868 \u7684\u7d22\u5f15\u6848\u4f8b\u5206\u4eab<\/strong><\/p>\n\n\n\n<p>\u4e3b\u952e\u4f7f\u7528order_id\uff0c\u5206\u5e03\u5f0f\u7cfb\u7edf\u53ef\u4ee5\u8003\u8651\u96ea\u82b1ID\u3002user_id\u5efa\u7acb\u7d22\u5f15\u652f\u6301\u7528\u6237\u67e5\u8be2\u3002create_time\u5efa\u7acb\u7d22\u5f15\u652f\u6301\u65f6\u95f4\u8303\u56f4\u67e5\u8be2\u3002status\u548cpayment_type\u5efa\u7acb\u8054\u5408\u7d22\u5f15\u7528\u4e8e\u8ba2\u5355\u5206\u6790\u3002\u907f\u514d\u4e3aprice\u7b49\u9891\u7e41\u66f4\u65b0\u7684\u5b57\u6bb5\u5355\u72ec\u5efa\u7d22\u5f15\u3002\u8003\u8651\u4f7f\u7528\u90e8\u5206\u7d22\u5f15\u53ea\u7d22\u5f15\u672a\u5b8c\u6210\u8ba2\u5355\u3002\u5b9a\u671f\u5f52\u6863\u5386\u53f2\u8ba2\u5355\u51cf\u5c11\u7d22\u5f15\u5927\u5c0f\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>8. \u603b\u7ed3\uff1a\u7d22\u5f15\u4f7f\u7528\u9ec4\u91d1\u6cd5\u5219<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u7ecf\u8fc7\u524d\u9762\u7684\u8be6\u7ec6\u8bb2\u89e3\uff0c\u6211\u4eec\u53ef\u4ee5\u603b\u7ed3\u51fa\u4e00\u4e9b\u7d22\u5f15\u4f7f\u7528\u7684\u9ec4\u91d1\u6cd5\u5219\u3002\u2018\u8bb0\u4f4f\u8fd9\u4e9b\u6cd5\u5219\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u907f\u514d\u5e38\u89c1\u7684\u7d22\u5f15\u8bbe\u8ba1\u9519\u8bef\uff0c\u5efa\u7acb\u9ad8\u6548\u7684\u6570\u636e\u5e93\u7ed3\u6784\u3002<\/p>\n\n\n\n<ul>\n<li>\u4e0d\u662f\u6240\u6709\u5b57\u6bb5\u90fd\u9700\u8981\u7d22\u5f15\uff0c\u53ea\u4e3a\u771f\u6b63\u9700\u8981\u7684\u67e5\u8be2\u6761\u4ef6\u5efa\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u8054\u5408\u7d22\u5f15\u4f18\u4e8e\u591a\u4e2a\u5355\u5217\u7d22\u5f15\uff0c\u4f46\u8981\u6ce8\u610f\u5b57\u6bb5\u987a\u5e8f\u3002<\/li>\n\n\n\n<li>\u533a\u5206\u5ea6\u9ad8\u7684\u5b57\u6bb5\u66f4\u9002\u5408\u7d22\u5f15\uff0c\u4f4e\u533a\u5206\u5ea6\u5b57\u6bb5\u8003\u8651\u8054\u5408\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u5b9a\u671f\u7ef4\u62a4\u6bd4\u76f2\u76ee\u6dfb\u52a0\u66f4\u91cd\u8981\uff0c\u53ca\u65f6\u5220\u9664\u65e0\u7528\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>5\u4e2a\u4ee5\u5185\u6700\u5065\u5eb7\uff0c\u8d85\u8fc78\u4e2a\u8981\u4e09\u601d\uff0c\u5fc5\u987b\u6709\u5145\u5206\u7406\u7531\u3002<\/li>\n\n\n\n<li>\u7406\u89e3\u4e1a\u52a1\u67e5\u8be2\u6a21\u5f0f\u662f\u8bbe\u8ba1\u597d\u7d22\u5f15\u7684\u524d\u63d0\u3002<\/li>\n\n\n\n<li>\u76d1\u63a7\u548c\u4f18\u5316\u662f\u6301\u7eed\u8fc7\u7a0b\uff0c\u4e0d\u662f\u4e00\u6b21\u6027\u7684\u5de5\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u4e9b\u6cd5\u5219\u4e0d\u662f\u6b7b\u677f\u7684\u6559\u6761\uff0c\u800c\u662f\u6307\u5bfc\u6027\u7684\u539f\u5219\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u8c03\u6574\u3002&nbsp;<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>9.\u7d22\u5f15\u4e3a\u4ec0\u4e48\u4f1a \u201c\u5b58\u50a8\u5f88\u591a\u201d\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u53ef\u4ee5\u628a\u7d22\u5f15\u7406\u89e3\u6210 \u201c\u6570\u636e\u7684\u526f\u672c + \u76ee\u5f55\u201d\uff0c\u5b83\u7684\u5b58\u50a8\u91cf\u751a\u81f3\u53ef\u80fd\u8d85\u8fc7\u539f\u59cb\u6570\u636e\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u6bcf\u68f5\u7d22\u5f15\u6811\u90fd\u662f\u72ec\u7acb\u7684\u526f\u672c<\/strong><br>\u6bd4\u5982\u4e00\u5f20\u7528\u6237\u8868\u6709&nbsp;<code>id<\/code>\u3001<code>name<\/code>\u3001<code>age<\/code>&nbsp;\u4e09\u4e2a\u5b57\u6bb5\uff0c\u4e3a&nbsp;<code>name<\/code>&nbsp;\u548c&nbsp;<code>age<\/code>&nbsp;\u5206\u522b\u5efa\u7d22\u5f15\uff0c\u5c31\u4f1a\u751f\u6210\u4e24\u68f5\u72ec\u7acb\u7684 B + \u6811\uff1a\n<ul>\n<li><code>name<\/code>&nbsp;\u7d22\u5f15\u6811\uff1a\u5b58\u50a8\u6240\u6709&nbsp;<code>name<\/code>&nbsp;\u7684\u503c + \u5bf9\u5e94\u8bb0\u5f55\u7684\u4f4d\u7f6e<\/li>\n\n\n\n<li><code>age<\/code>&nbsp;\u7d22\u5f15\u6811\uff1a\u5b58\u50a8\u6240\u6709&nbsp;<code>age<\/code>&nbsp;\u7684\u503c + \u5bf9\u5e94\u8bb0\u5f55\u7684\u4f4d\u7f6e<br>\u6bcf\u4e2a\u7d22\u5f15\u6811\u90fd\u9700\u8981\u5355\u72ec\u5360\u7528\u78c1\u76d8\u7a7a\u95f4\uff0c\u5b57\u6bb5\u8d8a\u591a\u3001\u7d22\u5f15\u8d8a\u591a\uff0c\u603b\u5b58\u50a8\u91cf\u8d8a\u5927\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u7d22\u5f15\u6811\u7684 \u201c\u5197\u4f59\u7ed3\u6784\u201d<\/strong><br>B + \u6811\u4e3a\u4e86\u5feb\u901f\u67e5\u8be2\uff0c\u9664\u4e86\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u5b9e\u9645\u7d22\u5f15\u503c\uff0c\u4e2d\u95f4\u8282\u70b9\u8fd8\u8981\u5b58\u50a8 \u201c\u8303\u56f4\u6807\u8bb0\u201d\uff08\u6bd4\u5982&nbsp;<code>age &lt; 30<\/code>&nbsp;\u6307\u5411\u5de6\u5b50\u6811\uff0c<code>age \u226530<\/code>&nbsp;\u6307\u5411\u53f3\u5b50\u6811\uff09\uff0c\u8fd9\u4e9b\u7ed3\u6784\u4e5f\u4f1a\u5360\u7528\u989d\u5916\u7a7a\u95f4\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff1a\u4e00\u5f20 100 \u4e07\u884c\u7684\u8868\uff0c\u6bcf\u884c\u6570\u636e 1KB\uff0c\u539f\u59cb\u6570\u636e\u7ea6 1GB\uff1b\u5982\u679c\u5efa 5 \u4e2a\u7d22\u5f15\uff0c\u6bcf\u4e2a\u7d22\u5f15\u53ef\u80fd\u5360\u7528 200-500MB\uff0c\u603b\u7d22\u5f15\u7a7a\u95f4\u53ef\u80fd\u8fbe\u5230 1-2.5GB\uff0c\u751a\u81f3\u8d85\u8fc7\u539f\u59cb\u6570\u636e\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>10.\u66f4\u65b0\u6570\u636e\u65f6\uff0c\u7d22\u5f15\u662f\u5982\u4f55\u66f4\u65b0\u7684\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5f53\u4f60\u6267\u884c&nbsp;<code>INSERT<\/code>\u3001<code>UPDATE<\/code>\u3001<code>DELETE<\/code>&nbsp;\u65f6\uff0c\u6570\u636e\u5e93\u4e0d\u4ec5\u8981\u6539\u539f\u59cb\u6570\u636e\uff0c\u8fd8\u8981\u540c\u6b65\u66f4\u65b0\u6240\u6709\u76f8\u5173\u7684\u7d22\u5f15\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u7c7b\u4f3c \u201c\u6539\u65e5\u8bb0 + \u540c\u6b65\u6539\u6240\u6709\u76ee\u5f55\u201d\uff1a<\/p>\n\n\n\n<p><strong>1. \u63d2\u5165\u6570\u636e\uff08INSERT\uff09<\/strong><\/p>\n\n\n\n<p>\u6bd4\u5982\u63d2\u5165\u4e00\u6761&nbsp;<code>(id=10, name=\"\u5f20\u4e09\", age=25)<\/code>&nbsp;\u7684\u8bb0\u5f55\uff1a<\/p>\n\n\n\n<ul>\n<li>\u5148\u628a\u8fd9\u6761\u8bb0\u5f55\u5199\u5165\u6570\u636e\u9875\uff08\u7c7b\u4f3c\u628a\u65e5\u8bb0\u5185\u5bb9\u5199\u5230\u67d0\u4e00\u9875\uff09\u3002<\/li>\n\n\n\n<li>\u7136\u540e\uff0c\u4e3a\u6bcf\u4e2a\u7d22\u5f15 \u201c\u540c\u6b65\u66f4\u65b0\u76ee\u5f55\u201d\uff1a<ul><li><code>id<\/code>&nbsp;\u7d22\u5f15\u6811\uff1a\u5728 B + \u6811\u4e2d\u627e\u5230&nbsp;<code>10<\/code>&nbsp;\u5bf9\u5e94\u7684\u4f4d\u7f6e\uff0c\u63d2\u5165\u65b0\u8282\u70b9\uff0c\u540c\u65f6\u8c03\u6574\u6811\u7684\u7ed3\u6784\uff08\u4fdd\u8bc1\u5e73\u8861\uff09\u3002<\/li><li><code>name<\/code>&nbsp;\u7d22\u5f15\u6811\uff1a\u5728\u6811\u4e2d\u627e\u5230 \u201c\u5f20\u4e09\u201d \u5bf9\u5e94\u7684\u4f4d\u7f6e\uff0c\u63d2\u5165\u65b0\u8282\u70b9\u5e76\u8c03\u6574\u7ed3\u6784\u3002<\/li><li><code>age<\/code>&nbsp;\u7d22\u5f15\u6811\uff1a\u540c\u6837\u5728\u6811\u4e2d\u63d2\u5165&nbsp;<code>25<\/code>&nbsp;\u5bf9\u5e94\u7684\u8282\u70b9\u5e76\u8c03\u6574\u3002<\/li><\/ul><strong>\u5173\u952e<\/strong>\uff1a\u6bcf\u4e2a\u7d22\u5f15\u90fd\u8981\u5355\u72ec\u6267\u884c\u4e00\u6b21 \u201c\u63d2\u5165 + \u6811\u5e73\u8861\u201d \u64cd\u4f5c\uff0c\u7d22\u5f15\u8d8a\u591a\uff0c\u63d2\u5165\u8d8a\u6162\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>2. \u4fee\u6539\u6570\u636e\uff08UPDATE\uff09<\/strong><\/p>\n\n\n\n<p>\u5206\u4e24\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u4fee\u6539\u7684\u5b57\u6bb5\u6ca1\u6709\u7d22\u5f15<\/strong>\uff1a\u6bd4\u5982\u53ea\u6539&nbsp;<code>age<\/code>&nbsp;\u4f46&nbsp;<code>age<\/code>&nbsp;\u6ca1\u5efa\u7d22\u5f15\uff0c\u53ea\u9700\u6539\u539f\u59cb\u6570\u636e\uff0c\u7d22\u5f15\u4e0d\u52a8\u3002<\/li>\n\n\n\n<li><strong>\u4fee\u6539\u7684\u5b57\u6bb5\u6709\u7d22\u5f15<\/strong>\uff1a\u6bd4\u5982\u6539&nbsp;<code>name<\/code>&nbsp;\u4ece \u201c\u5f20\u4e09\u201d \u5230 \u201c\u674e\u56db\u201d\uff08<code>name<\/code>&nbsp;\u6709\u7d22\u5f15\uff09\uff1a<ul><li>\u5148\u6539\u539f\u59cb\u6570\u636e\u4e2d\u7684&nbsp;<code>name<\/code>&nbsp;\u5b57\u6bb5\u3002<\/li><li>\u7136\u540e\u5728&nbsp;<code>name<\/code>&nbsp;\u7d22\u5f15\u6811\u4e2d\uff1a<br>\u2460 \u5220\u9664\u65e7\u503c \u201c\u5f20\u4e09\u201d \u5bf9\u5e94\u7684\u8282\u70b9\uff08\u4ece\u6811\u4e2d\u79fb\u9664\u8be5\u6761\u76ee\uff09\u3002<br>\u2461 \u63d2\u5165\u65b0\u503c \u201c\u674e\u56db\u201d \u5bf9\u5e94\u7684\u8282\u70b9\uff08\u91cd\u65b0\u627e\u5230\u4f4d\u7f6e\u5e76\u63d2\u5165\uff09\u3002<br>\u2462 \u518d\u6b21\u8c03\u6574\u6811\u7ed3\u6784\uff0c\u4fdd\u8bc1\u5e73\u8861\u3002<\/li><\/ul><strong>\u5173\u952e<\/strong>\uff1a\u4fee\u6539\u7d22\u5f15\u5b57\u6bb5\u65f6\uff0c\u76f8\u5f53\u4e8e \u201c\u5148\u5220\u540e\u63d2\u201d\uff0c\u6bd4\u63d2\u5165\u64cd\u4f5c\u66f4\u8017\u65f6\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>3. \u5220\u9664\u6570\u636e\uff08DELETE\uff09<\/strong><\/p>\n\n\n\n<p>\u6bd4\u5982\u5220\u9664&nbsp;<code>id=10<\/code>&nbsp;\u7684\u8bb0\u5f55\uff1a<\/p>\n\n\n\n<ul>\n<li>\u539f\u59cb\u6570\u636e\u4e0d\u4f1a\u7acb\u5373\u4ece\u78c1\u76d8\u5220\u9664\uff08\u901a\u5e38\u505a\u4e2a \u201c\u5220\u9664\u6807\u8bb0\u201d\uff09\u3002<\/li>\n\n\n\n<li>\u7d22\u5f15\u6811\u4e2d\uff0c\u5bf9\u5e94\u7684\u8282\u70b9\u4f1a\u88ab\u6807\u8bb0\u4e3a \u201c\u65e0\u6548\u201d\uff0c\u5e76\u5728\u540e\u7eed\u7684 \u201c\u7d22\u5f15\u4f18\u5316\u201d\uff08\u5982 InnoDB \u7684 purge \u7ebf\u7a0b\uff09\u4e2d\u6e05\u7406\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u5220\u9664\u540e\u7d22\u5f15\u6811\u51fa\u73b0\u5927\u91cf\u7a7a\u6d1e\uff0c\u6570\u636e\u5e93\u4f1a\u5728\u7a7a\u95f2\u65f6\u81ea\u52a8 \u201c\u6574\u7406\u7d22\u5f15\u201d\uff08\u7c7b\u4f3c\u6574\u7406\u4e66\u67b6\uff0c\u628a\u96f6\u6563\u7684\u4e66\u5f52\u4f4d\uff09\u3002<strong>\u5173\u952e<\/strong>\uff1a\u5220\u9664\u867d\u7136\u4e0d\u7acb\u5373\u6e05\u7406\u7d22\u5f15\uff0c\u4f46\u6807\u8bb0\u548c\u540e\u7eed\u6574\u7406\u4ecd\u4f1a\u6d88\u8017\u8d44\u6e90\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>11.\u4e3a\u4ec0\u4e48\u7d22\u5f15\u591a\u4e86\u4f1a\u53d8\u6162\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u7528\u4e00\u4e2a\u6bd4\u55bb\u603b\u7ed3\uff1a<\/p>\n\n\n\n<ul>\n<li>\u539f\u59cb\u6570\u636e\u662f \u201c\u65e5\u8bb0\u672c\u6b63\u6587\u201d\uff0c\u7d22\u5f15\u662f \u201c\u4e0d\u540c\u5206\u7c7b\u7684\u76ee\u5f55\u201d\uff08\u6309\u65e5\u671f\u3001\u6309\u4e3b\u9898\u3001\u6309\u5173\u952e\u8bcd\u7b49\uff09\u3002<\/li>\n\n\n\n<li>\u6bcf\u6b21\u5199\u65e5\u8bb0\uff08\u63d2\u5165\uff09\u3001\u6539\u5185\u5bb9\uff08\u66f4\u65b0\uff09\u3001\u6495\u9875\uff08\u5220\u9664\uff09\uff0c\u90fd\u8981\u540c\u6b65\u4fee\u6539\u6240\u6709\u76ee\u5f55\u3002<\/li>\n\n\n\n<li>\u76ee\u5f55\u8d8a\u591a\uff08\u7d22\u5f15\u8d8a\u591a\uff09\uff0c\u6bcf\u6b21\u64cd\u4f5c\u5c31\u8981\u82b1\u8d8a\u591a\u65f6\u95f4\u6539\u76ee\u5f55\uff0c\u751a\u81f3\u53ef\u80fd\u56e0\u4e3a\u76ee\u5f55\u592a\u4e71\uff08\u7d22\u5f15\u6811\u4e0d\u5e73\u8861\uff09\uff0c\u5bfc\u81f4\u627e\u4e1c\u897f\u53cd\u800c\u53d8\u6162\uff08\u67e5\u8be2\u65f6 MySQL \u9009\u9519\u7d22\u5f15\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u963f\u91cc\u5df4\u5df4\u89c4\u8303\u5efa\u8bae\u5355\u8868\u7d22\u5f15\u4e0d\u8d85\u8fc7 5 \u4e2a \u2014\u2014 \u5e73\u8861\u67e5\u8be2\u6548\u7387\u548c\u5199\u5165 \/ \u5b58\u50a8\u6210\u672c\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>12. Mysql\u53ef\u4ee5\u540c\u65f6\u7528\u4e24\u4e2a\u4ee5\u4e0a\u7684\u5355\u5b57\u6bb5\u7d22\u5f15\u5417<\/strong>\uff1f<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>InnoDB_Table\u8868 col4 \u548c col5\u90fd\u6709\u7d22\u5f15\uff0c\u770b\u6267\u884c\u8ba1\u5212\uff0c\u53ea\u7528\u4e86col4\u7684\u7d22\u5f15<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"205\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-1024x205.png\" alt=\"\" class=\"wp-image-18629\" style=\"width:684px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-1024x205.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-300x60.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-768x154.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-1536x308.png 1536w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-2048x410.png 2048w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-830x166.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-230x46.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-350x70.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/08\/image-4-480x96.png 480w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u3000\u3000\u3000<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\u5404\u5b57\u6bb5\u542b\u4e49\u4e0e\u7ed3\u679c\u89e3\u8bfb\nid\uff1a\u6267\u884c\u8ba1\u5212\u7684\u6807\u8bc6 ID\uff0c\u8fd9\u91cc\u4e3a 1\uff0c\u8868\u793a\u53ea\u6709\u4e00\u4e2a\u67e5\u8be2\u6267\u884c\u5355\u5143\u3002\nselect_type\uff1a\u67e5\u8be2\u7c7b\u578b\uff0cSIMPLE \u8868\u793a\u8fd9\u662f\u7b80\u5355\u67e5\u8be2\uff08\u975e\u5b50\u67e5\u8be2\u3001\u975e\u8054\u5408\u67e5\u8be2\u7b49\u590d\u6742\u573a\u666f \uff09\u3002\ntable\uff1a\u6d89\u53ca\u7684\u8868\uff0c\u8fd9\u91cc\u662f InnoDB_Table\u3002\npartitions\uff1a\u67e5\u8be2\u6d89\u53ca\u7684\u5206\u533a\uff0c[NULL] \u8868\u793a\u8868\u672a\u5206\u533a\u3002\ntype\uff1aMySQL \u5728\u8868\u4e2d\u627e\u5230\u6240\u9700\u884c\u7684\u65b9\u5f0f\uff08\u5373\u8bbf\u95ee\u7c7b\u578b\uff09\uff0cref \u8868\u793a\u5229\u7528\u7d22\u5f15\u67e5\u627e\uff0c\u4e14\u7d22\u5f15\u5217\u4e0e\u5e38\u91cf\u6bd4\u8f83\uff08\u6548\u7387\u8f83\u9ad8\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u6bd4 ALL\uff08\u5168\u8868\u626b\uff09\u597d\u5f88\u591a \uff09\u3002\npossible_keys\uff1aMySQL \u8ba4\u4e3a\u53ef\u80fd\u80fd\u7528\u4e8e\u6b64\u67e5\u8be2\u7684\u7d22\u5f15\uff0c\u8fd9\u91cc\u662f col4_index,col5_index\uff0c\u5373 col4 \u548c col5 \u5b57\u6bb5\u5404\u81ea\u7684\u7d22\u5f15\u3002\nkey\uff1a\u5b9e\u9645\u9009\u62e9\u7528\u4e8e\u67e5\u8be2\u7684\u7d22\u5f15\uff0c\u8fd9\u91cc\u662f col4_index\uff0c\u8bf4\u660e\u4f18\u5316\u5668\u6700\u7ec8\u9009\u4e86 col4 \u7684\u7d22\u5f15\u6765\u6267\u884c\u67e5\u8be2\u3002\nkey_len\uff1a\u4f7f\u7528\u7684\u7d22\u5f15\u957f\u5ea6\uff0c7 \u8868\u793a\u7d22\u5f15\u5b57\u6bb5\u53c2\u4e0e\u67e5\u8be2\u7684\u957f\u5ea6\uff08\u9700\u7ed3\u5408\u5b57\u6bb5\u7c7b\u578b\u63a8\u65ad\uff0c\u6bd4\u5982 col4 \u53ef\u80fd\u662f\u5b57\u7b26\u7c7b\u578b\uff0c\u6309\u7f16\u7801\u8ba1\u7b97\u540e\u5360\u7528 7 \u5b57\u8282 \uff09\u3002\nref\uff1a\u4e0e\u7d22\u5f15\u6bd4\u8f83\u7684\u5185\u5bb9\uff0cconst \u8868\u793a\u662f\u5e38\u91cf\uff08\u5373\u67e5\u8be2\u6761\u4ef6\u91cc col4 = '1' \u4e2d\u7684 '1' \u662f\u5e38\u91cf \uff09\u3002\nrows\uff1aMySQL \u8ba4\u4e3a\u5b83\u6267\u884c\u67e5\u8be2\u65f6\u5fc5\u987b\u68c0\u67e5\u7684\u884c\u6570\uff0c\u8fd9\u91cc 1 \u8868\u793a\u9884\u8ba1\u53ea\u9700\u626b\u63cf 1 \u884c\u5c31\u80fd\u627e\u5230\u7ed3\u679c\u3002\nfiltered\uff1a\u8868\u793a\u8fd4\u56de\u7ed3\u679c\u7684\u884c\u5360\u9700\u626b\u63cf\u884c\u7684\u767e\u5206\u6bd4\uff0c100.0 \u8bf4\u660e\u7b26\u5408\u6761\u4ef6\u7684\u884c\u5360\u6bd4\u9ad8\uff08\u7ed3\u5408 rows=1\uff0c\u5c31\u662f\u8fd9 1 \u884c\u90fd\u7b26\u5408\u6761\u4ef6 \uff09\u3002\nExtra\uff1a\u989d\u5916\u4fe1\u606f\uff0cUsing where \u8868\u793a\u67e5\u8be2\u4f7f\u7528\u4e86 WHERE \u6761\u4ef6\u8fc7\u6ee4\u6570\u636e\u3002\u2018\n\n\u6574\u4f53\u6267\u884c\u903b\u8f91\n\u4f18\u5316\u5668\u8bc4\u4f30\u540e\uff0c\u9009\u62e9 col4_index \u7d22\u5f15\uff0c\u7528 col4 = '1' \u5feb\u901f\u5b9a\u4f4d\u6570\u636e\uff08\u501f\u52a9 ref \u7c7b\u578b\u7684\u7d22\u5f15\u67e5\u627e \uff09\u3002\n\u627e\u5230\u5bf9\u5e94\u884c\u540e\uff0c\u518d\u7528 col5 = '2' \u6761\u4ef6\u8fc7\u6ee4\uff08Using where \u4f53\u73b0\u8fd9\u4e00\u6b65 \uff09\uff0c\u6700\u7ec8\u8fd4\u56de\u7ed3\u679c\u3002\n\u7531\u4e8e\u53ea\u7528\u5230 col4 \u7684\u7d22\u5f15\uff0ccol5 \u7684\u7d22\u5f15\u867d\u5728 possible_keys \u4f46\u672a\u88ab\u9009\u4e2d\uff0c\u53ef\u80fd\u662f\u4f18\u5316\u5668\u8ba4\u4e3a\u7528 col4 \u7d22\u5f15\u914d\u5408 WHERE \u8fc7\u6ee4\u66f4\u9ad8\u6548\u3002<\/pre>\n\n\n\n<p>\u5728 MySQL \u4e2d\uff0c\u5f53<code>col4<\/code>\u548c<code>col5<\/code>\u662f\u5355\u72ec\u7684\u5355\u5b57\u6bb5\u7d22\u5f15\uff0c\u800c\u975e\u590d\u5408\u7d22\u5f15\u65f6\uff0c\u4f18\u5316\u5668\u4e00\u822c\u4e00\u6b21\u67e5\u8be2\u53ea\u7528 1 \u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\uff0c\u65e0\u6cd5\u540c\u65f6\u7528\u5230\u4e24\u4e2a\uff0c\u4e3b\u8981\u662f\u7531\u4ee5\u4e0b\u51e0\u65b9\u9762\u539f\u56e0\u51b3\u5b9a\u7684\uff1a<\/p>\n\n\n\n<p><strong>1. \u7d22\u5f15\u7684\u6570\u636e\u7ed3\u6784\u548c\u67e5\u627e\u539f\u7406<\/strong><\/p>\n\n\n\n<p>MySQL \u4e2d\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\u662f B + \u6811\u7d22\u5f15\u3002\u5bf9\u4e8e\u5355\u5b57\u6bb5\u7d22\u5f15\uff0cB + \u6811\u662f\u57fa\u4e8e\u5355\u4e2a\u5b57\u6bb5\u7684\u503c\u6784\u5efa\u7684\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u7d22\u5f15\u67e5\u627e\u8fc7\u7a0b<\/strong>\uff1a\u4ee5<code>col4_index<\/code>\u4e3a\u4f8b\uff0c\u5f53\u4f7f\u7528\u8fd9\u4e2a\u7d22\u5f15\u8fdb\u884c\u67e5\u627e\u65f6\uff0cMySQL \u4f1a\u4ece B + \u6811\u7684\u6839\u8282\u70b9\u5f00\u59cb\uff0c\u6309\u7167\u6811\u7684\u7ed3\u6784\u9010\u6b65\u5411\u4e0b\u627e\u5230\u5339\u914d<code>col4<\/code>\u503c\u7684\u53f6\u5b50\u8282\u70b9\uff0c\u4ece\u800c\u5b9a\u4f4d\u5230\u5bf9\u5e94\u7684\u884c\u8bb0\u5f55\uff08\u6216\u8005\u8bb0\u5f55\u7684\u4e3b\u952e\u503c\uff0c\u7136\u540e\u518d\u901a\u8fc7\u4e3b\u952e\u56de\u8868\u83b7\u53d6\u5b8c\u6574\u6570\u636e\uff09\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c\u5b83\u53ea\u5229\u7528\u4e86<code>col4<\/code>\u5b57\u6bb5\u7684\u4fe1\u606f\u3002<\/li>\n\n\n\n<li><strong>\u591a\u7d22\u5f15\u540c\u65f6\u4f7f\u7528\u7684\u51b2\u7a81<\/strong>\uff1a\u5982\u679c\u8981\u540c\u65f6\u4f7f\u7528<code>col4_index<\/code>\u548c<code>col5_index<\/code>\uff0c\u5c31\u76f8\u5f53\u4e8e\u8981\u540c\u65f6\u5728\u4e24\u68f5\u72ec\u7acb\u7684 B + \u6811\u4e0a\u8fdb\u884c\u67e5\u627e\u3002\u8fd9\u4e24\u68f5\u6811\u662f\u57fa\u4e8e\u4e0d\u540c\u5b57\u6bb5\u6784\u5efa\u7684\uff0c\u6ca1\u6709\u76f4\u63a5\u7684\u5173\u8054\u5173\u7cfb\uff0c\u65e0\u6cd5\u76f4\u63a5\u5c06\u4e24\u4e2a\u7d22\u5f15\u7684\u67e5\u627e\u7ed3\u679c\u9ad8\u6548\u5730\u5408\u5e76\u8d77\u6765\u5b9a\u4f4d\u5230\u6ee1\u8db3\u4e24\u4e2a\u6761\u4ef6\u7684\u884c\u8bb0\u5f55\u3002\u56e0\u4e3a\u6bcf\u4e2a\u7d22\u5f15\u53ea\u80fd\u63d0\u4f9b\u4e00\u4e2a\u7ef4\u5ea6\u7684\u7b5b\u9009\uff0c\u800c MySQL \u5f88\u96be\u5728\u4e0d\u9020\u6210\u5927\u91cf\u989d\u5916\u5f00\u9500\u7684\u60c5\u51b5\u4e0b\uff0c\u540c\u65f6\u5229\u7528\u8fd9\u4e24\u4e2a\u72ec\u7acb\u7684\u7b5b\u9009\u7ed3\u679c\u53bb\u5feb\u901f\u5b9a\u4f4d\u5230\u6700\u7ec8\u7b26\u5408\u4e24\u4e2a\u6761\u4ef6\u7684\u884c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>2. \u4f18\u5316\u5668\u7684\u6210\u672c\u4f30\u7b97\u548c\u9009\u62e9\u7b56\u7565<\/strong><\/p>\n\n\n\n<p>MySQL \u7684\u67e5\u8be2\u4f18\u5316\u5668\u4f1a\u5bf9\u4e0d\u540c\u7684\u6267\u884c\u8ba1\u5212\u8fdb\u884c\u6210\u672c\u4f30\u7b97\uff0c\u9009\u62e9\u6210\u672c\u6700\u4f4e\u7684\u90a3\u4e2a\u6765\u6267\u884c\u3002<\/p>\n\n\n\n<ul>\n<li><strong>\u6210\u672c\u8ba1\u7b97\u56e0\u7d20<\/strong>\uff1a\u4f18\u5316\u5668\u5728\u8bc4\u4f30\u662f\u5426\u4f7f\u7528\u67d0\u4e2a\u7d22\u5f15\u65f6\uff0c\u4f1a\u8003\u8651\u5f88\u591a\u56e0\u7d20\uff0c\u5982\u626b\u63cf\u7684\u884c\u6570\u3001\u968f\u673a I\/O \u7684\u6b21\u6570\u3001CPU \u7684\u6d88\u8017\u7b49\u3002\u5bf9\u4e8e\u5355\u5b57\u6bb5\u7d22\u5f15\uff0c\u5f53\u6709\u591a\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\u53ef\u4f9b\u9009\u62e9\u65f6\uff0c\u4f18\u5316\u5668\u4f1a\u8ba4\u4e3a\u4f7f\u7528\u5176\u4e2d\u4e00\u4e2a\u7d22\u5f15\u8fdb\u884c\u521d\u6b65\u7b5b\u9009\uff0c\u7136\u540e\u518d\u901a\u8fc7 WHERE \u6761\u4ef6\u8fc7\u6ee4\u5176\u4ed6\u6761\u4ef6\u7684\u6210\u672c\uff0c\u8981\u4f4e\u4e8e\u540c\u65f6\u5c1d\u8bd5\u4f7f\u7528\u591a\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\u5e76\u5408\u5e76\u7ed3\u679c\u7684\u6210\u672c\u3002<\/li>\n\n\n\n<li><strong>\u5408\u5e76\u6210\u672c\u9ad8<\/strong>\uff1a\u5982\u679c\u5c1d\u8bd5\u540c\u65f6\u4f7f\u7528\u4e24\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\uff0c\u5c31\u9700\u8981\u989d\u5916\u7684\u64cd\u4f5c\u6765\u5408\u5e76\u4e24\u4e2a\u7d22\u5f15\u7684\u67e5\u627e\u7ed3\u679c\uff0c\u6bd4\u5982\u5bf9\u4e24\u4e2a\u7d22\u5f15\u627e\u5230\u7684\u884c\u8bb0\u5f55\u96c6\u5408\u8fdb\u884c\u4ea4\u96c6\u8fd0\u7b97\u3002\u8fd9\u4e2a\u5408\u5e76\u8fc7\u7a0b\u53ef\u80fd\u4f1a\u6d89\u53ca\u5230\u5927\u91cf\u7684\u5185\u5b58\u64cd\u4f5c\u3001\u6392\u5e8f\u64cd\u4f5c\u7b49\uff0c\u4f1a\u5e26\u6765\u8f83\u9ad8\u7684\u6210\u672c\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u9009\u62e9\u4e00\u4e2a\u7b5b\u9009\u80fd\u529b\u66f4\u5f3a\uff08\u533a\u5206\u5ea6\u66f4\u9ad8\uff0c\u80fd\u8fc7\u6ee4\u6389\u66f4\u591a\u6570\u636e\uff09\u7684\u5355\u5b57\u6bb5\u7d22\u5f15\uff0c\u5148\u5927\u5e45\u7f29\u5c0f\u6570\u636e\u8303\u56f4\uff0c\u518d\u901a\u8fc7 WHERE \u6761\u4ef6\u8fc7\u6ee4\u53e6\u4e00\u4e2a\u6761\u4ef6\uff0c\u6574\u4f53\u7684\u6267\u884c\u6210\u672c\u66f4\u4f4e\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>3. \u5386\u53f2\u8bbe\u8ba1\u548c\u6027\u80fd\u6743\u8861<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>\u8bbe\u8ba1\u521d\u8877<\/strong>\uff1aMySQL \u5728\u8bbe\u8ba1\u4e4b\u521d\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u67e5\u8be2\u4f18\u5316\u5668\u7684\u590d\u6742\u5ea6\u53ef\u63a7\u4ee5\u53ca\u6267\u884c\u6548\u7387\u7684\u7a33\u5b9a\u6027\uff0c\u5c31\u91c7\u7528\u4e86\u8fd9\u79cd\u4f18\u5148\u9009\u62e9\u5355\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\uff08\u5728\u591a\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\u4e2d\u9009\u62e9\u4e00\u4e2a\u6700\u5408\u9002\u7684\uff09\u7684\u7b56\u7565\u3002\u8fd9\u6837\u53ef\u4ee5\u7b80\u5316\u4f18\u5316\u5668\u7684\u51b3\u7b56\u903b\u8f91\uff0c\u51cf\u5c11\u4f18\u5316\u8fc7\u7a0b\u4e2d\u7684\u4e0d\u786e\u5b9a\u6027\u3002<\/li>\n\n\n\n<li><strong>\u6027\u80fd\u8868\u73b0<\/strong>\uff1a\u5728\u5927\u591a\u6570\u5b9e\u9645\u573a\u666f\u4e2d\uff0c\u9009\u62e9\u5355\u4e2a\u533a\u5206\u5ea6\u9ad8\u7684\u5355\u5b57\u6bb5\u7d22\u5f15\uff0c\u5148\u8fdb\u884c\u521d\u6b65\u7b5b\u9009\uff0c\u518d\u7ed3\u5408 WHERE \u6761\u4ef6\u8fc7\u6ee4\uff0c\u5df2\u7ecf\u80fd\u591f\u6ee1\u8db3\u6027\u80fd\u9700\u6c42\u3002\u540c\u65f6\u4f7f\u7528\u591a\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\u5e76\u5408\u5e76\u7ed3\u679c\u7684\u60c5\u51b5\uff0c\u5728\u5b9e\u9645\u4e2d\u5f80\u5f80\u4f1a\u56e0\u4e3a\u5408\u5e76\u64cd\u4f5c\u7684\u590d\u6742\u6027\u5bfc\u81f4\u6027\u80fd\u53cd\u800c\u4e0d\u5982\u9009\u62e9\u5355\u4e2a\u5408\u9002\u7d22\u5f15\u7684\u60c5\u51b5\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5047\u8bbe\u6709\u4e00\u5f20<code>orders<\/code>\u8868\uff0c<code>customer_id<\/code>\u548c<code>order_date<\/code>\u5b57\u6bb5\u4e0a\u5206\u522b\u6709\u5355\u5b57\u6bb5\u7d22\u5f15\u3002\u5982\u679c\u67e5\u8be2<code>SELECT * FROM orders WHERE customer_id = 123 AND order_date = '2024-01-01'<\/code>\uff0c\u4f18\u5316\u5668\u4f1a\u8bc4\u4f30<code>customer_id<\/code>\u7d22\u5f15\u548c<code>order_date<\/code>\u7d22\u5f15\u54ea\u4e2a\u80fd\u66f4\u6709\u6548\u5730\u7f29\u5c0f\u6570\u636e\u8303\u56f4\u3002\u5982\u679c<code>customer_id<\/code>\u7d22\u5f15\u80fd\u7b5b\u9009\u51fa\u8f83\u5c11\u7684\u884c\uff0c\u4f18\u5316\u5668\u5c31\u4f1a\u9009\u62e9<code>customer_id<\/code>\u7d22\u5f15\uff0c\u7136\u540e\u518d\u901a\u8fc7 WHERE \u6761\u4ef6\u8fc7\u6ee4<code>order_date<\/code>\uff0c\u800c\u4e0d\u662f\u540c\u65f6\u5c1d\u8bd5\u4f7f\u7528\u4e24\u4e2a\u7d22\u5f15\u5e76\u5408\u5e76\u7ed3\u679c\u3002<\/p>\n\n\n\n<p>\u4e0d\u8fc7\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u968f\u7740 MySQL \u7248\u672c\u7684\u4e0d\u65ad\u6f14\u8fdb\uff0c\u5728\u67d0\u4e9b\u7279\u5b9a\u573a\u666f\u4e0b\uff0c\u4e5f\u6709\u4e00\u4e9b\u4f18\u5316\u6280\u672f\uff08\u5982\u7d22\u5f15\u4e0b\u63a8\u7b49\uff09\u53ef\u4ee5\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u66f4\u597d\u5730\u5229\u7528\u591a\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\uff0c\u4f46\u603b\u4f53\u539f\u5219\u4e0a\uff0c\u4e00\u6b21\u67e5\u8be2\u4f18\u5148\u4f7f\u7528\u4e00\u4e2a\u5355\u5b57\u6bb5\u7d22\u5f15\u7684\u60c5\u51b5\u4ecd\u7136\u662f\u6bd4\u8f83\u5e38\u89c1\u7684\u3002<\/p>\n\n\n\n<p>\u82e5\u60f3\u8ba9&nbsp;<code>col4<\/code>&nbsp;\u548c&nbsp;<code>col5<\/code>&nbsp;\u540c\u65f6\u7528\u7d22\u5f15\uff0c\u9700\u521b\u5efa&nbsp;<strong>\u590d\u5408\u7d22\u5f15<\/strong>\uff08\u8054\u5408\u7d22\u5f15 \uff09\uff0c\u5982\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">CREATE INDEX idx_col4_col5 ON InnoDB_Table (col4, col5);\n<\/pre>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u90a3\u5982\u679c \u5229\u7528 col4_index\u3000\u627e\u5230\u4e86col4\u5b57\u6bb5\u3001 \u5982\u4f55\u518d\u627e\u5230col5\u5462<\/strong>\uff1f<\/p>\n\n\n\n<p>\u5f53\u4f7f\u7528&nbsp;<code>col4_index<\/code>&nbsp;\u627e\u5230\u5339\u914d&nbsp;<code>col4<\/code>&nbsp;\u6761\u4ef6\u7684\u884c\u540e\uff0cMySQL \u4f1a\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5904\u7406&nbsp;<code>col5<\/code>&nbsp;\u7684\u6761\u4ef6\uff1a<\/p>\n\n\n\n<p><strong>1.&nbsp;\u901a\u8fc7&nbsp;<code>col4_index<\/code>&nbsp;\u5b9a\u4f4d\u5230\u884c\u6570\u636e\uff08\u6216\u4e3b\u952e\uff09<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>InnoDB \u573a\u666f<\/strong>\uff1a<code>col4_index<\/code>&nbsp;\u662f\u4e8c\u7ea7\u7d22\u5f15\uff0c\u5176 B + \u6811\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u7684\u662f&nbsp;<code>col4<\/code>&nbsp;\u7684\u503c + \u5bf9\u5e94\u884c\u7684&nbsp;<strong>\u4e3b\u952e\u503c<\/strong>\uff08\u800c\u975e\u5b8c\u6574\u884c\u6570\u636e\uff09\u3002<br>\u6240\u4ee5\uff0c\u7b2c\u4e00\u6b65\u662f\u901a\u8fc7&nbsp;<code>col4_index<\/code>&nbsp;\u5feb\u901f\u627e\u5230\u6240\u6709\u6ee1\u8db3&nbsp;<code>col4 = '1'<\/code>&nbsp;\u7684\u4e3b\u952e\u503c\uff08\u6bd4\u5982&nbsp;<code>id = 100, 101, 102<\/code>\uff09\u3002<\/li>\n\n\n\n<li><strong>\u56de\u8868\u83b7\u53d6\u5b8c\u6574\u884c\u6570\u636e<\/strong>\uff1a\u62ff\u5230\u4e3b\u952e\u503c\u540e\uff0cMySQL \u4f1a\u518d\u901a\u8fc7&nbsp;<strong>\u4e3b\u952e\u7d22\u5f15<\/strong>&nbsp;\u67e5\u627e\u5bf9\u5e94\u7684\u5b8c\u6574\u884c\u6570\u636e\uff08\u5305\u542b&nbsp;<code>col5<\/code>&nbsp;\u7b49\u6240\u6709\u5b57\u6bb5\uff09\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u79f0\u4e3a \u201c\u56de\u8868\u201d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>2.&nbsp;\u8fc7\u6ee4&nbsp;<code>col5<\/code>&nbsp;\u6761\u4ef6<\/strong><\/p>\n\n\n\n<p>\u83b7\u53d6\u5b8c\u6574\u884c\u6570\u636e\u540e\uff0cMySQL \u4f1a\u5728\u5185\u5b58\u4e2d\u5bf9\u8fd9\u4e9b\u884c\u6267\u884c&nbsp;<code>WHERE col5 = '2'<\/code>&nbsp;\u7684\u8fc7\u6ee4\uff1a<\/p>\n\n\n\n<ul>\n<li>\u904d\u5386\u6240\u6709\u901a\u8fc7&nbsp;<code>col4_index<\/code>&nbsp;\u627e\u5230\u7684\u884c\uff0c\u68c0\u67e5\u6bcf\u884c\u7684&nbsp;<code>col5<\/code>&nbsp;\u5b57\u6bb5\u662f\u5426\u7b49\u4e8e&nbsp;<code>'2'<\/code>\u3002<\/li>\n\n\n\n<li>\u53ea\u4fdd\u7559\u540c\u65f6\u6ee1\u8db3&nbsp;<code>col4 = '1'<\/code>&nbsp;\u548c&nbsp;<code>col5 = '2'<\/code>&nbsp;\u7684\u884c\uff0c\u6700\u7ec8\u8fd4\u56de\u7ed3\u679c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u793a\u4f8b\u6d41\u7a0b\u62c6\u89e3<\/strong><\/p>\n\n\n\n<p>\u5047\u8bbe\u8868\u7ed3\u6784\uff1a<code>id (\u4e3b\u952e), col4, col5, ...<\/code>\uff0c\u4e14&nbsp;<code>col4<\/code>&nbsp;\u6709\u5355\u72ec\u7d22\u5f15\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u67e5&nbsp;<code>col4_index<\/code><\/strong>\uff1a\u627e\u5230&nbsp;<code>col4 = '1'<\/code>&nbsp;\u5bf9\u5e94\u7684\u4e3b\u952e&nbsp;<code>id = 100, 101, 102<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u56de\u8868\u67e5\u4e3b\u952e\u7d22\u5f15<\/strong>\uff1a\u901a\u8fc7&nbsp;<code>id = 100, 101, 102<\/code>&nbsp;\u627e\u5230\u5b8c\u6574\u884c\u6570\u636e\uff1a\n<ul>\n<li><code>id=100<\/code>\uff1a<code>col4='1', col5='2'<\/code><\/li>\n\n\n\n<li><code>id=101<\/code>\uff1a<code>col4='1', col5='3'<\/code><\/li>\n\n\n\n<li><code>id=102<\/code>\uff1a<code>col4='1', col5='2'<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8fc7\u6ee4&nbsp;<code>col5<\/code><\/strong>\uff1a\u4fdd\u7559&nbsp;<code>col5='2'<\/code>&nbsp;\u7684\u884c\uff08<code>id=100<\/code>&nbsp;\u548c&nbsp;<code>id=102<\/code>\uff09\uff0c\u8fd4\u56de\u7ed3\u679c\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u5173\u952e\u7279\u70b9<\/strong><\/p>\n\n\n\n<ul>\n<li><strong><code>col5_index<\/code>&nbsp;\u672a\u88ab\u4f7f\u7528<\/strong>\uff1a\u56e0\u4e3a\u6b64\u65f6&nbsp;<code>col5<\/code>&nbsp;\u7684\u8fc7\u6ee4\u662f\u5728\u56de\u8868\u540e<strong>\u5185\u5b58\u4e2d\u5b8c\u6210\u7684<\/strong>\uff0c\u65e0\u9700\u518d\u67e5&nbsp;<code>col5_index<\/code>\uff08\u67e5\u7d22\u5f15\u53cd\u800c\u4f1a\u589e\u52a0\u5f00\u9500\uff09\u3002<\/li>\n\n\n\n<li><strong>\u6548\u7387\u53d6\u51b3\u4e8e\u56de\u8868\u884c\u6570<\/strong>\uff1a\u5982\u679c&nbsp;<code>col4 = '1'<\/code>&nbsp;\u5339\u914d\u7684\u884c\u6570\u5f88\u5c11\uff08\u6bd4\u5982\u53ea\u6709 2 \u884c\uff09\uff0c\u5185\u5b58\u8fc7\u6ee4\u5f88\u5feb\uff1b\u5982\u679c\u884c\u6570\u5f88\u591a\uff08\u6bd4\u5982 10 \u4e07\u884c\uff09\uff0c\u5219\u8fc7\u6ee4\u6548\u7387\u4f1a\u4e0b\u964d\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u5982\u4f55\u4f18\u5316\uff1f<\/strong><\/p>\n\n\n\n<p>\u82e5\u60f3\u907f\u514d\u56de\u8868\u540e\u7684\u5185\u5b58\u8fc7\u6ee4\uff0c\u53ef\u521b\u5efa&nbsp;<strong><code>(col4, col5)<\/code>&nbsp;\u590d\u5408\u7d22\u5f15<\/strong>\uff1a<\/p>\n\n\n\n<ul>\n<li>\u590d\u5408\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u5b58\u50a8&nbsp;<code>col4 + col5 + \u4e3b\u952e<\/code>\uff0c\u67e5\u8be2\u65f6\u53ef\u76f4\u63a5\u901a\u8fc7\u7d22\u5f15\u7b5b\u9009&nbsp;<code>col4 = '1' AND col5 = '2'<\/code>\uff0c\u65e0\u9700\u56de\u8868\u8fc7\u6ee4\uff0c\u6548\u7387\u66f4\u9ad8\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u6709\u5c0f\u4f19\u4f34\u62ff\u5230\u4e86\u4e00\u7ebf\u4e92\u8054\u7f51\u4f01\u4e1a\u5982\u5f97\u7269\u3001\u963f\u91cc\u3001\u6ef4\u6ef4\u3001\u6781\u5154\u3001\u6709\u8d5e\u3001shein \u5e0c\u97f3\u3001shopee\u3001\u767e\u5ea6\u3001\u7f51\u6613\u7684\u9762 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18616"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=18616"}],"version-history":[{"count":9,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18616\/revisions"}],"predecessor-version":[{"id":18632,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18616\/revisions\/18632"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18616"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18616"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18616"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}