{"id":16909,"date":"2025-02-12T09:57:08","date_gmt":"2025-02-12T01:57:08","guid":{"rendered":"https:\/\/92it.top\/?p=16909"},"modified":"2025-08-04T09:35:37","modified_gmt":"2025-08-04T01:35:37","slug":"%e6%95%b0%e6%8d%ae%e5%ba%93%e7%9a%84%e7%b4%a2%e5%bc%95%ef%bc%8c%e8%b6%8a%e5%a4%9a%e8%b6%8a%e5%a5%bd%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=16909","title":{"rendered":"\u6570\u636e\u5e93\u7684\u7d22\u5f15\uff0c\u8d8a\u591a\u8d8a\u597d\u5417\uff1f"},"content":{"rendered":"\n<p><strong>\u7d22\u5f15<\/strong>\uff1a\u7d22\u5f15\u662f\u5e2e\u52a9\u6570\u636e\u5e93\u9ad8\u6548\u83b7\u53d6\u6570\u636e\u7684\u6570\u636e\u7ed3\u6784\u3002<\/p>\n\n\n\n<p>\u5728 MySQL \u4e2d\uff0c<strong>\u7d22\u5f15\uff08Index\uff09<\/strong>&nbsp;\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5feb\u901f\u67e5\u8be2\u6570\u636e\u5e93\u8868\u4e2d\u7684\u7279\u5b9a\u8bb0\u5f55\u3002\u5b83\u7c7b\u4f3c\u4e8e\u4e66\u7c4d\u7684\u76ee\u5f55\uff0c\u901a\u8fc7\u63d0\u524d\u6392\u5e8f\u548c\u5b58\u50a8\u5173\u952e\u4fe1\u606f\uff0c\u907f\u514d\u4e86\u5168\u8868\u626b\u63cf\uff08\u9010\u884c\u67e5\u627e\uff09\u7684\u4f4e\u6548\u64cd\u4f5c\uff0c\u4ece\u800c\u5927\u5e45\u63d0\u5347\u67e5\u8be2\u6548\u7387\u3002<\/p>\n\n\n\n<p><strong>\u7d22\u5f15\u7684\u6838\u5fc3\u4f5c\u7528<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<ol>\n<li><strong>\u52a0\u901f\u67e5\u8be2<\/strong>\uff1a\u901a\u8fc7\u7d22\u5f15\u53ef\u4ee5\u76f4\u63a5\u5b9a\u4f4d\u5230\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u4f4d\u7f6e\uff0c\u51cf\u5c11\u6570\u636e\u626b\u63cf\u8303\u56f4\u3002<\/li>\n\n\n\n<li><strong>\u4f18\u5316\u6392\u5e8f<\/strong>\uff1a\u5982\u679c\u67e5\u8be2\u5305\u542b\u00a0<code>ORDER BY<\/code>\u00a0\u6216\u00a0<code>GROUP BY<\/code>\uff0c\u7d22\u5f15\u53ef\u4ee5\u907f\u514d\u989d\u5916\u7684\u6392\u5e8f\u64cd\u4f5c\uff08\u5229\u7528\u7d22\u5f15\u672c\u8eab\u7684\u6709\u5e8f\u6027\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7d22\u5f15\u7684\u5de5\u4f5c\u539f\u7406<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u7d22\u5f15\u672c\u8d28\u662f\u5bf9\u8868\u4e2d\u4e00\u5217\u6216\u591a\u5217\u7684\u503c\u8fdb\u884c<strong>\u6392\u5e8f<\/strong>\uff0c\u5e76\u5b58\u50a8\u8fd9\u4e9b\u503c\u4e0e\u5bf9\u5e94\u8bb0\u5f55\u7269\u7406\u4f4d\u7f6e\uff08\u5982\u78c1\u76d8\u5730\u5740\uff09\u7684\u6620\u5c04\u5173\u7cfb\u3002<\/p>\n\n\n\n<ul>\n<li>\u5f53\u6267\u884c\u67e5\u8be2\uff08\u5982\u00a0<code>WHERE \u5217\u540d = \u503c<\/code>\uff09\u65f6\uff0cMySQL \u4f1a\u5148\u67e5\u8be2\u7d22\u5f15\uff0c\u627e\u5230\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\u4f4d\u7f6e\uff0c\u518d\u76f4\u63a5\u8bfb\u53d6\u5bf9\u5e94\u7684\u6570\u636e\u3002<\/li>\n\n\n\n<li>\u6ca1\u6709\u7d22\u5f15\u65f6\uff0cMySQL \u9700\u8981\u9010\u884c\u626b\u63cf\u6574\u4e2a\u8868\uff08\u5168\u8868\u626b\u63cf\uff09\uff0c\u6548\u7387\u6781\u4f4e\uff08\u5c24\u5176\u8868\u6570\u636e\u91cf\u5927\u65f6\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u5173\u4e8e\u7d22\u5f15\u7684\u8bef\u89e3<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<ul>\n<li>\u7d22\u5f15\u5e76\u4e0d\u662f\u8d8a\u591a\u8d8a\u597d\uff0c\u7d22\u5f15\u592a\u591a\uff0c\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u53ef\u80fd\u4f1a\u53d7\u5230\u5f71\u54cd\uff1b\u7d22\u5f15\u592a\u5c11\uff0c\u5bf9\u67e5\u8be2\u6027\u80fd\u53c8\u4f1a\u4ea7\u751f\u5f71\u54cd\u3002<\/li>\n\n\n\n<li>\u7d22\u5f15\u6700\u597d\u662f\u521d\u59cb\u65f6\u6dfb\u52a0\uff0c\u540e\u7eed\u6dfb\u52a0\u7684\u8bdd\uff0c\u4f1a\u5904\u7406\u76f8\u5f53\u5927\u7684\u4e00\u90e8\u5206\u6570\u636e\u3002<\/li>\n\n\n\n<li>\u521d\u59cb\u65f6\u5019\u8ba9DBA\u6dfb\u52a0\uff0c\u7531\u4e8eDBA\u5f80\u5f80\u4e0d\u4e86\u89e3\u4e1a\u52a1\u7684\u6570\u636e\u6d41\uff0c\u5f80\u5f80\u6dfb\u52a0\u5f97\u4e0d\u591f\u7cbe\u786e<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7d22\u5f15\u7684\u539f\u7406<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u7d22\u5f15\u7684\u76ee\u7684\u5728\u4e8e\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u672c\u8d28\u662f\u901a\u8fc7\u4e0d\u65ad\u7684\u7f29\u5c0f\u60f3\u8981\u83b7\u53d6\u6570\u636e\u7684\u8303\u56f4\u6765\u7b5b\u9009\u51fa\u6700\u7ec8\u60f3\u8981\u7684\u7ed3\u679c\uff0c\u540c\u65f6\u628a\u968f\u673a\u7684\u65f6\u95f4\u7f16\u7a0b\u987a\u5e8f\u7684\u4e8b\u4ef6\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u6709\u4e86\u8fd9\u79cd\u7d22\u5f15\u673a\u5236\uff0c\u6211\u4eec\u53ef\u4ee5\u603b\u662f\u7528\u540c\u4e00\u79cd\u67e5\u627e\u65b9\u5f0f\u6765\u9501\u5b9a\u6570\u636e\u3002<\/p>\n\n\n\n<p>b+\u6811\u7684\u67e5\u627e\u8fc7\u7a0b<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"523\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-1024x523.png\" alt=\"\" class=\"wp-image-16910\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-1024x523.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-300x153.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-768x392.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-830x424.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-230x117.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-350x179.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14-480x245.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/02\/image-14.png 1222w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>\u5982\u56fe\u6240\u793a\uff0c\u5982\u679c\u8981\u67e5\u627e\u6570\u636e\u987929\uff0c\u90a3\u4e48\u9996\u5148\u4f1a\u628a\u78c1\u76d8\u57571\u7531\u78c1\u76d8\u52a0\u8f7d\u5230\u5185\u5b58\uff0c\u6b64\u65f6\u53d1\u751f\u4e00\u6b21IO\uff0c\u5728\u5185\u5b58\u4e2d\u7528\u4e8c\u5206\u67e5\u627e\u786e\u5b9a29\u572817\u548c35\u4e4b\u95f4\uff0c\u9501\u5b9a\u78c1\u76d8\u57571\u7684P2\u6307\u9488\uff0c\u5185\u5b58\u65f6\u95f4\u56e0\u4e3a\u975e\u5e38\u77ed\uff08\u76f8\u6bd4\u78c1\u76d8\u7684IO\uff09\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\uff0c\u901a\u8fc7\u78c1\u76d8\u57571\u7684P2\u6307\u9488\u7684\u78c1\u76d8\u5730\u5740\u628a\u78c1\u76d8\u57573\u7531\u78c1\u76d8\u52a0\u8f7d\u5230\u5185\u5b58\uff0c\u53d1\u751f\u7b2c\u4e8c\u6b21IO\uff0c29\u572826\u548c30\u4e4b\u95f4\uff0c\u9501\u5b9a\u78c1\u76d8\u57573\u7684P2\u6307\u9488\uff0c\u901a\u8fc7\u6307\u9488\u52a0\u8f7d\u78c1\u76d8\u57578\u5230\u5185\u5b58\uff0c\u53d1\u751f\u7b2c\u4e09\u6b21IO\uff0c\u540c\u65f6\u5185\u5b58\u4e2d\u505a\u4e8c\u5206\u67e5\u627e\u627e\u523029\uff0c\u7ed3\u675f\u67e5\u8be2\uff0c\u603b\u8ba1\u4e09\u6b21IO\u3002<\/p>\n\n\n\n<p>3\u5c42\u7684b+\u6811\u53ef\u4ee5\u8868\u793a\u4e0a\u767e\u4e07\u7684\u6570\u636e\uff0c\u5982\u679c\u4e0a\u767e\u4e07\u7684\u6570\u636e\u67e5\u627e\u53ea\u9700\u8981\u4e09\u6b21IO\uff0c\u6027\u80fd\u63d0\u9ad8\u5c06\u662f\u5de8\u5927\u7684\uff0c\u5982\u679c\u6ca1\u6709\u7d22\u5f15\uff0c\u6bcf\u4e2a\u6570\u636e\u9879\u90fd\u8981\u53d1\u751f\u4e00\u6b21IO\uff0c\u90a3\u4e48\u603b\u5171\u9700\u8981\u767e\u4e07\u6b21\u7684IO\uff0c\u663e\u7136\u6210\u672c\u975e\u5e38\u975e\u5e38\u9ad8\u3002<\/p>\n\n\n\n<p>MySQL\u6570\u636e\u5e93\u4e2d\u7684\u7d22\u5f15\u5e76\u975e\u5efa\u5f97\u8d8a\u591a\u8d8a\u597d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7406\u7531\u8bf4\u660e\u4e3a\u4ec0\u4e48\u7d22\u5f15\u4e0d\u662f\u8d8a\u591a\u8d8a\u6709\u5229\uff1a<\/p>\n\n\n\n<ul>\n<li>1. \u5b58\u50a8\u7a7a\u95f4\uff1a\u7d22\u5f15\u9700\u8981\u5360\u7528\u989d\u5916\u7684\u78c1\u76d8\u7a7a\u95f4\uff0c\u6bcf\u4e2a\u7d22\u5f15\u90fd\u662f\u5bf9\u6570\u636e\u8868\u7684\u4e00\u90e8\u5206\u6570\u636e\u8fdb\u884c\u6392\u5e8f\u540e\u5355\u72ec\u5b58\u50a8\u7684\u7ed3\u6784\u3002\u7d22\u5f15\u8d8a\u591a\uff0c\u5360\u7528\u7684\u7a7a\u95f4\u8d8a\u5927\u3002<\/li>\n\n\n\n<li>2. \u5199\u64cd\u4f5c\u6027\u80fd\u635f\u8017\uff1a\u6bcf\u5f53\u5bf9\u8868\u8fdb\u884cINSERT\u3001UPDATE\u3001DELETE\u64cd\u4f5c\u65f6\uff0c\u5982\u679c\u6d89\u53ca\u7d22\u5f15\u5217\uff0c\u4e0d\u4ec5\u8981\u66f4\u65b0\u6570\u636e\u8868\u672c\u8eab\uff0c\u8fd8\u9700\u8981\u66f4\u65b0\u76f8\u5173\u7d22\u5f15\uff0c\u8fd9\u4f1a\u589e\u52a0\u5199\u64cd\u4f5c\u7684\u5f00\u9500\uff0c\u964d\u4f4e\u5199\u5165\u901f\u5ea6\u3002<\/li>\n\n\n\n<li>3. \u7ef4\u62a4\u6210\u672c\uff1a\u968f\u7740\u6570\u636e\u7684\u53d8\u5316\uff0c\u7d22\u5f15\u9700\u8981\u4e0d\u65ad\u5730\u7ef4\u62a4\u548c\u66f4\u65b0\u4ee5\u4fdd\u6301\u5176\u6b63\u786e\u6027\uff0c\u8fd9\u4f1a\u6d88\u8017\u6570\u636e\u5e93\u670d\u52a1\u5668<\/li>\n\n\n\n<li>\u7684CPU\u548cI\/O\u8d44\u6e90\u3002<\/li>\n\n\n\n<li>4. \u8bfb\u53d6\u6548\u7387\u8003\u8651\uff1a\u867d\u7136\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\uff0c\u4f46\u4e0d\u662f\u6240\u6709\u67e5\u8be2\u90fd\u80fd\u4ece\u7d22\u5f15\u4e2d\u53d7\u76ca\u3002\u5bf9\u4e8e\u7b80\u5355\u7684\u67e5\u8be2\u6216\u8005\u6570\u636e\u91cf\u8f83\u5c0f\u7684\u8868\uff0c\u5168\u8868\u626b\u63cf\u53ef\u80fd\u6bd4\u4f7f\u7528\u7d22\u5f15\u66f4\u5feb\u3002<\/li>\n\n\n\n<li>5. \u7d22\u5f15\u9009\u62e9\u6027\uff1a\u53ea\u6709\u5728\u67e5\u8be2\u4e2d\u9891\u7e41\u4f7f\u7528\uff0c\u5e76\u4e14\u5177\u6709\u8f83\u9ad8\u9009\u62e9\u6027\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\u624d\u6709\u610f\u4e49\u3002\u9009\u62e9\u6027\u6307\u7d22\u5f15\u5217\u4e2d\u4e0d\u540c\u503c\u7684\u6570\u91cf\u4e0e\u603b\u884c\u6570\u7684\u6bd4\u4f8b\uff0c\u9009\u62e9\u6027\u4f4e\u7684\u5217\uff08\u5982\u6027\u522b\u5b57\u6bb5\uff0c\u901a\u5e38\u53ea\u6709\u4e24\u4e2a\u503c\uff09\u4e0d\u9002\u5408\u505a\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>6. \u8fc7\u5ea6\u7d22\u5f15\uff1a\u4e3a\u4e0d\u5e38\u4f7f\u7528\u7684\u5217\u6216\u8005\u5df2\u7ecf\u5728\u5176\u4ed6\u7d22\u5f15\u4e2d\u8986\u76d6\u5230\u7684\u5217\u521b\u5efa\u7d22\u5f15\u662f\u6ca1\u6709\u5fc5\u8981\u7684\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u8d44\u6e90\u6d6a\u8d39\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u603b\u7ed3<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u8bbe\u8ba1\u7d22\u5f15\u7b56\u7565\u65f6\u5e94\u6839\u636e\u5b9e\u9645\u4e1a\u52a1\u9700\u6c42\u3001\u67e5\u8be2\u6a21\u5f0f\u3001\u6570\u636e\u89c4\u6a21\u53ca\u66f4\u65b0\u9891\u7387\u7b49\u56e0\u7d20\u7efc\u5408\u8003\u8651\uff0c\u65e2\u8981\u786e\u4fdd\u5173\u952e\u67e5\u8be2\u80fd\u5f97\u5230\u6709\u6548\u52a0\u901f\uff0c\u53c8\u8981\u907f\u514d\u56e0\u8fc7\u591a\u7d22\u5f15\u5e26\u6765\u7684\u8d1f\u9762\u5f71\u54cd\u3002\u56e0\u6b64\uff0c\u5408\u7406\u4f18\u5316\u548c\u9009\u62e9\u6027\u5730\u521b\u5efa\u7d22\u5f15\u624d\u662f\u6700\u4f73\u5b9e\u8df5<\/p>\n\n\n\n<p>\u4e0d\u662f\uff0c<strong>\u7d22\u5f15\u5e76\u4e0d\u662f\u8d8a\u591a\u8d8a\u597d<\/strong>\uff0c\u5b9e\u9645\u4e0a\u7d22\u5f15\u6570\u91cf\u8fc7\u591a\uff0c\u53cd\u800c\u4f1a\u5bfc\u81f4\u4e00\u7cfb\u5217<strong>\u6027\u80fd\u95ee\u9898<\/strong>\u548c<strong>\u7cfb\u7edf\u8d1f\u62c5<\/strong>\u3002<\/p>\n\n\n\n<p>1. 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