{"id":17568,"date":"2025-06-09T09:33:08","date_gmt":"2025-06-09T01:33:08","guid":{"rendered":"https:\/\/92it.top\/?p=17568"},"modified":"2025-06-09T09:33:08","modified_gmt":"2025-06-09T01:33:08","slug":"%e4%b8%ba%e5%95%a5mysql%e4%b8%8d%e5%bb%ba%e8%ae%ae%e7%94%a8delete%e5%88%a0%e6%95%b0%e6%8d%ae%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=17568","title":{"rendered":"\u4e3a\u5565MySQL\u4e0d\u5efa\u8bae\u7528DELETE\u5220\u6570\u636e\uff1f"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1a\u963f\u91cc\u9762\u8bd5\uff1a\u4e3a\u5565MySQL\u4e0d\u5efa\u8bae\u7528DELETE\u5220\u6570\u636e\uff1f<\/a><\/p>\n\n\n\n

\u80cc\u666f<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u4e3a\u5565MySQL\u4e0d\u5efa\u8bae\u7528DELETE\u5220\u6570\u636e\uff1f\u8bf4\u767d\u4e86\uff0c\u4f60\u53ef\u80fd\u8fd8\u771f\u4e0d\u914d\u7528\u5b83<\/p>\n\n\n\n

\u5f88\u591a\u4eba\u770b\u5230\u8fd9\u91cc\u53ef\u80fd\u4e0d\u7981\u7591\u60d1\u4e86\uff0c\u90a3\u4e0d\u7528Delete\u5220\u9664\u6570\u636e\uff0c\u90a3\u7528\u4ec0\u4e48\u5220\u9664\u6570\u636e\u5462\uff1f<\/p>\n\n\n\n

\u963f\u91cc\u9762\u8bd5\u95ee\u8fd9\u4e2a\u95ee\u9898\uff0c\u8fd8\u771f\u4e0d\u662f\u5201\u96be\u4f60\uff0c\u662f\u60f3\u770b\u770b\u4f60\u5230\u5e95\u662fCRUD\u6c11\u5de5\uff0c\u8fd8\u662f\u80fd\u628a\u6570\u636e\u5e93\u5f53\u670b\u53cb\u7528\u7684\u8001\u70ae\u513f\u3002<\/p>\n\n\n\n

DELETE\u542c\u8d77\u6765\u5f88\u6e05\u723d\uff0c\u7528\u8d77\u6765\u5f80\u5f80\u201c\u796d\u5929\u201d<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u9996\u5148\uff0cDELETE\u4e0d\u662f\u4e0d\u80fd\u7528\uff0c\u800c\u662f\u4f60\u5f97\u77e5\u9053\u5b83\u7684\u4ee3\u4ef7\uff0c\u4f60\u5f97\u77e5\u9053\u5b83\u80cc\u540e\u5230\u5e95\u505a\u4e86\u5565\u3002\u5f88\u591a\u4eba\u5199\u4e2aSQL\u5c31\u662f\uff1a<\/p>\n\n\n\n

DELETE FROM user WHERE status = 'inactive';<\/pre>\n\n\n\n
\u770b\u7740\u6e05\u6e05\u723d\u723d\uff0c\u6267\u884c\u5b8c\u4e86\u63a7\u5236\u53f0\u8fd8\u7ed9\u4f60\u6765\u53e5\u201cQuery OK, 1000000 rows affected\u201d\uff0c\u7136\u540e\u670d\u52a1\u560e\u7684\u4e00\u58f0\u5b95\u673a\uff0cQPS\u8dcc\u6210\u72d7\uff0cDBA\u5934\u53d1\u5f00\u59cb\u8c22\u843d\uff0c\u9886\u5bfc\u95ee\u4f60\u662f\u4e0d\u662f\u624b\u6ed1\u4e86\u3002<\/p>\n\n\n\n
\u8fd9\u6ce2\u64cd\u4f5c\uff0c\u7ebf\u4e0a\u7684\u9505\u4f60\u5f97\u80cc\uff0c\u7b80\u5386\u5f97\u66f4\u65b0\uff0c\u5173\u952e\u662f\u4f60\u8fd8\u4e0d\u77e5\u9053\u9519\u54ea\u4e86\u3002<\/p>\n\n\n\n
MySQL DELETE\u5e95\u5c42\u5230\u5e95\u5e72\u4e86\u5565\uff1f<\/strong><\/p>\n\n\n\n
\n\n\n\n
MySQL\u7684DELETE\uff0c\u5176\u5b9e\u80cc\u5730\u91cc\u975e\u5e38\u91cd\uff0c\u5c24\u5176\u662f\u4f60\u5220\u7684\u662fInnoDB\u8868\uff0c\u5b83\u505a\u7684\u4e8b\u60c5\u6bd4\u4f60\u4ee5\u4e3a\u7684\u591a\u5f97\u591a\uff1a<\/p>\n\n\n\n
1. DELETE\u4e0d\u662f\u7269\u7406\u5220\u9664\uff0c\u800c\u662f\u884c\u7ea7\u5220\u9664 + \u65e5\u5fd7\u8bb0\u5f55<\/strong><\/p>\n\n\n\n
InnoDB\u662f\u652f\u6301\u4e8b\u52a1\u7684\uff0c\u5b83\u4e0d\u80fd\u8bf4\u5220\u5c31\u5220\uff0c\u5f97\u6709\u56de\u6eda\u80fd\u529b\u3002\u6240\u4ee5\u5b83\u505a\u4e86\u8fd9\u4e9b\u4e8b\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
    \n
  • \u6807\u8bb0\u8981\u5220\u9664\u7684\u884c<\/li>\n\n\n\n
  • \u5199UNDO\u65e5\u5fd7\uff08\u4e3a\u4e86\u4e8b\u52a1\u56de\u6eda\uff09<\/li>\n\n\n\n
  • \u5199REDO\u65e5\u5fd7\uff08\u4e3a\u4e86\u5d29\u4e86\u8fd8\u80fd\u6062\u590d\uff09<\/li>\n\n\n\n
  • \u66f4\u65b0\u7d22\u5f15\uff08\u4e3b\u952e+\u4e8c\u7ea7\u7d22\u5f15\u5168\u90e8\u90fd\u5f97\u52a8\u624b\uff09<\/li>\n\n\n\n
  • \u6700\u540e\u624d\u662f\u771f\u6b63\u7684\u6807\u8bb0\u884c\u5df2\u5220\u9664 \u4f60\u4ee5\u4e3a\u4f60\u5728\u201c\u6e05\u7a7a\u201d\uff0c\u5176\u5b9e\u4f60\u5728\u8d70\u4e00\u6574\u5957\u4e8b\u52a1\u673a\u5236\uff0c\u8ddf\u79bb\u5a5a\u4e00\u6837\uff0c\u5f97\u5148\u7533\u8bf7\u3001\u5907\u6848\u3001\u8c03\u89e3\u3001\u8d70\u6d41\u7a0b\uff0c\u6700\u540e\u5224\u79bb\u3002\u5168\u8868DELETE\u5c31\u76f8\u5f53\u4e8e\u529e\u96c6\u4f53\u79bb\u5a5a\uff0c\u653f\u52a1\u5927\u5385\u90fd\u80fd\u7206\u4e86\u3002<\/li>\n<\/ul>\n\n\n\n
    2. \u5220\u9664\u7684\u884c\u4e0d\u4f1a\u9a6c\u4e0a\u91ca\u653e\u7a7a\u95f4<\/strong><\/p>\n\n\n\n
    InnoDB\u505a\u7684\u662fMVCC\uff08\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236\uff09\uff0cDELETE\u4e4b\u540e\u7684\u6570\u636e\u5e76\u4e0d\u4f1a\u7acb\u9a6c\u6d88\u5931\uff0c\u65e7\u7248\u672c\u8fd8\u7559\u7740\uff0c\u4e8b\u52a1\u6ca1\u63d0\u4ea4\u524d\u4f60\u8fd8\u80fd\u67e5\u51fa\u6765\u3002<\/p>\n\n\n\n
    \u5373\u4fbf\u63d0\u4ea4\u4e86\uff0c\u78c1\u76d8\u7a7a\u95f4\u4e5f\u4e0d\u4f1a\u91ca\u653e\u3002\u4f60DELETE 100W \u884c\uff0c\u78c1\u76d8\u5360\u7528\u53ef\u80fd\u4e00\u4e2a\u5b57\u8282\u90fd\u4e0d\u964d\u3002\u4f60\u5f97\u7b49\u5b83\u81ea\u5df1\u89e6\u53d1PURGE\u6d41\u7a0b\uff0c\u6216\u8005\u4f60\u4e3b\u52a8\u505aOPTIMIZE TABLE\uff0c\u624d\u80fd\u56de\u6536\u3002<\/p>\n\n\n
    \n
    \"\"<\/figure><\/div>\n\n\n
    \u5927\u54e5\u4f60\u5220\u4e86\u8fd8\u5f97\u81ea\u5df1\u6536\u62fe\u6218\u573a\uff0c\u8fd9\u53eb\u5565\uff1f\u8fd9\u53eb\u201c\u4f60\u6740\u4eba\u4f60\u8fd8\u5f97\u64e6\u8840\u8ff9\u201d\uff0c\u4f60\u8bf4\u7d2f\u4e0d\u7d2f\u3002<\/p>\n\n\n\n
    DELETE\u7684\u51e0\u4e2a\u96f7?<\/strong><\/p>\n\n\n\n
    \n\n\n\n
    1. DELETE\u5927\u8868\uff0c\u76f4\u63a5\u9501\u6b7b\u7ebf\u4e0a\u7cfb\u7edf<\/strong><\/p>\n\n\n\n
    \u67d0\u5e74\u67d0\u6708\u67d0\u65e5\uff0c\u4e00\u4e2a\u5b9e\u4e60\u751f\uff08\u4e0d\u662f\u6211\uff09\u8981\u6e05\u96643\u4e2a\u6708\u524d\u7684\u8ba2\u5355\uff0c\u5199\u4e86\u4e2a\uff1a<\/p>\n\n\n\n
    DELETE FROM orders WHERE create_time < '2023-01-01';<\/pre>\n\n\n\n
    \u7136\u540e\u6309\u4e0b\u6267\u884c\uff0cMySQL\u77ac\u95f4CPU\u98d9\u5347\uff0c\u8868\u9501\u6b7b\uff0c\u6240\u6709\u67e5\u8ba2\u5355\u7684\u63a5\u53e3\u76f4\u63a5502\u3002\u5ba2\u670d\u5728\u5de5\u4f4d\u4e0a\u54ed\uff0c\u8fd0\u7ef4\u5728\u7535\u8bdd\u91cc\u9a82\uff0c\u9886\u5bfc\u8fdb\u4f1a\u8bae\u5ba4\u6253\u6211\uff08\u867d\u7136\u4e0d\u662f\u6211\u5e72\u7684\uff09\u3002<\/p>\n\n\n\n
    \u95ee\u9898\u5728\u54ea\uff1f<\/strong><\/p>\n\n\n\n
      \n
    • \u6ca1\u5206\u9875<\/li>\n\n\n\n
    • \u6ca1\u7528LIMIT<\/li>\n\n\n\n
    • \u6ca1\u7528\u7d22\u5f15\uff08\u662f\u7684\uff0ccreate_time\u6ca1\u5efa\u7d22\u5f15\uff09<\/li>\n\n\n\n
    • \u6ca1\u5f52\u6863\u7b56\u7565<\/li>\n\n\n\n
    • \u4e00\u6761SQL\uff0c\u628a\u6574\u4e2a\u5e93\u603c\u762b\u4e86 DELETE\u9ed8\u8ba4\u662f\u884c\u9501\uff0c\u4f46\u4f60\u5220\u592a\u591a\u884c\uff0c\u5b83\u53ef\u80fd\u5347\u7ea7\u4e3a\u8868\u9501\uff0c\u4f60\u90a3\u70b9\u5c0fQPS\u6839\u672c\u625b\u4e0d\u4f4f\u3002<\/li>\n<\/ul>\n\n\n\n
      2. DELETE\u4f1a\u62d6\u57aeredo log<\/strong><\/p>\n\n\n\n
      InnoDB\u5199redo log\u6709\u7f13\u51b2\u533a\uff0c\u6709write-ahead\u673a\u5236\uff0c\u4f46DELETE\u4e00\u591a\uff0c\u65e5\u5fd7\u91cf\u9661\u589e\uff0c\u7f13\u5b58\u76f4\u63a5\u7206\u6389\uff0cIO\u8ddf\u4e0d\u4e0a\uff0c\u5199\u76d8\u963b\u585e\u3002<\/p>\n\n\n\n
      \u4f60\u4ee5\u4e3a\u662fDELETE\u5361\u4f4f\u4e86\uff0c\u5176\u5b9e\u662f\u78c1\u76d8\u5728\u75af\u72c2\u8f6c\uff0cbinlog\u3001undo log\u3001redo log\u90fd\u6324\u5728\u90a3\u6392\u961f\u3002<\/p>\n\n\n\n
      3. DELETE\u5f71\u54cd\u4e3b\u4ece\u5ef6\u8fdf<\/strong><\/p>\n\n\n\n
      \u5927\u5382\u4e3b\u4ece\u67b6\u6784\u90fd\u8dd1\u5f97\u98de\u5feb\uff0c\u4f46DELETE\u4e00\u8dd1\uff0cbinlog\u5237\u4e00\u5806\uff0c\u4ece\u5e93\u5ef6\u8fdf\u76f4\u63a5\u4e0a\u5929\u3002<\/p>\n\n\n\n
      \u4e3b\u5e93\u5199\u4e86\u4e00\u4e2a\u5c0f\u65f6\uff0c\u4ece\u5e93\u8fd8\u5728\u56de\u653e\u90a3\u6761SQL\u3002\u4f60\u8981\u662f\u8fd8\u6709\u8bfb\u5199\u5206\u79bb\uff0c\u90a3\u8fd9\u65f6\u5019\u8bfb\u5230\u7684\u6570\u636e\u90fd\u662f\u65e7\u7684\uff0c\u8ba2\u5355\u663e\u793a\u201c\u672a\u652f\u4ed8\u201d\uff0c\u5176\u5b9e\u4eba\u5bb6\u65e9\u4ed8\u6b3e\u4e86\uff0c\u5206\u5206\u949f\u6295\u8bc9\u4f60\u865a\u5047\u4ea4\u6613\u3002<\/p>\n\n\n\n
      \u4e3a\u5565\u963f\u91cc\u4e0d\u5efa\u8bae\u7528DELETE\uff1f<\/strong><\/p>\n\n\n\n
      \n\n\n\n
      \u522b\u8bf4\u963f\u91cc\uff0c\u5b57\u8282\u3001\u817e\u8baf\u3001\u4eac\u4e1c\u90fd\u4e00\u6837\uff0c\u5bf9DELETE\u6709\u660e\u786e\u8981\u6c42\u3002<\/p>\n\n\n\n
      \u50cf\u963f\u91cc\u7684\u6570\u636e\u91cf\uff0c\u4e00\u5f20\u8868\u52a8\u8f84\u4e0a\u4ebf\u6570\u636e\u3002<\/p>\n\n\n\n
      \u4f60\u4e00\u53e5DELETE\uff0c\u5168\u5220\u4e86\uff0c\u5206\u5e93\u5206\u8868\u7684\u8def\u90fd\u767d\u8d70\u4e86\uff0c\u4e1a\u52a1\u7ebf\u53ef\u80fd\u4e00\u4e2a\u6708\u90fd\u6062\u590d\u4e0d\u8fc7\u6765\u3002<\/p>\n\n\n\n
      \u6240\u4ee5\u5728\u5927\u5382\uff0cDELETE\u57fa\u672c\u4e0a\u6709\u4ee5\u4e0b\u89c4\u5b9a\uff1a<\/p>\n\n\n\n
        \n
      • \u7981\u6b62\u5728\u4e3b\u5e93DELETE\u8d85\u8fc7N\u6761\u8bb0\u5f55<\/li>\n\n\n\n
      • DELETE\u5fc5\u987b\u5e26LIMIT\uff0c\u5fc5\u987b\u8d70\u7d22\u5f15<\/li>\n\n\n\n
      • \u5927\u8868DELETE\u5fc5\u987b\u8d70\u5f52\u6863\u903b\u8f91\uff0c\u4e0d\u5141\u8bb8\u76f4\u63a5\u5220<\/li>\n\n\n\n
      • \u5b9a\u65f6\u5f52\u6863\u8d70\u72ec\u7acb\u811a\u672c + \u5ef6\u8fdf\u6d88\u8d39<\/li>\n\n\n\n
      • \u56de\u6536\u7b56\u7565\u7528DROP\u5206\u8868 + \u91cd\u5efa\u8868<\/li>\n<\/ul>\n\n\n\n
        \u800c\u4e0d\u662f\u5199\u4e2aDELETE FROM xxx WHERE xxx\uff0c\u90a3\u662f\u4f5c\u6b7b\u901f\u901a\u8def\u7ebf\u3002<\/p>\n\n\n\n
        \u90a3\u4e0d\u7528DELETE\uff0c\u548b\u6e05\u6570\u636e\uff1f<\/strong><\/p>\n\n\n\n
        \n\n\n\n
        1. DELETE + LIMIT + SLEEP \u6162\u6162\u5220<\/strong><\/strong><\/p>\n\n\n\n
        \u8fd9\u4e2a\u662f\u7ecf\u5178\u5957\u8def\uff1a<\/p>\n\n\n\n
        -- \u5206\u6279\u5220\u9664\uff0c\u6bcf\u6b21\u53ea\u52201000\u6761\nDELETE FROM orders WHERE create_time < '2023-01-01' LIMIT 1000;\n-- \u5faa\u73af + SLEEP 1s \u907f\u514dIO\u66b4\u51b2<\/pre>\n\n\n\n
        \u5199\u6210\u5b58\u50a8\u8fc7\u7a0b\u3001\u811a\u672c\uff0c\u8dd1\u5b9a\u65f6\u4efb\u52a1\uff0c\u6162\u6162\u632a\uff0c\u4f60\u50cf\u5012\u5783\u573e\u4e00\u6837\uff0c\u522b\u5168\u5f80\u697c\u4e0b\u6254\uff0c\u5206\u6279\u5206\u7c7b\u5904\u7406\u3002<\/p>\n\n\n\n
        2. \u5f52\u6863\u8f6c\u79fb + \u8868\u5207\u6362<\/strong><\/p>\n\n\n\n
          \n
        1. \u65b0\u8868 orders_archive<\/li>\n\n\n\n
        2. insert into orders_archive select * from orders where create_time < xxx;<\/li>\n\n\n\n
        3. insert\u6210\u529f\u540e\uff0cDELETE or TRUNCATE or DROP\u8001\u6570\u636e<\/li>\n<\/ol>\n\n\n\n
          3. TRUNCATE + \u8868\u5206\u533a \/ \u5206\u8868\u7b56\u7565<\/strong><\/p>\n\n\n\n
          \u4f60\u60f3\u6e05\u7a7a\u6570\u636e\uff0c\u76f4\u63a5TRUNCATE\uff0c\u6bd4DELETE\u5e72\u51c0\u5229\u7d22\u3002\u4f46\u6761\u4ef6\u662f\uff1a<\/p>\n\n\n\n
            \n
          • \u8868\u4e0d\u80fd\u6709\u5916\u952e<\/li>\n\n\n\n
          • \u4f60\u8981\u6562\u76f4\u63a5\u6254\u6574\u4e2a\u8868<\/li>\n<\/ul>\n\n\n\n
            \u90a3\u548b\u529e\uff1f\u7528\u5206\u8868\u3002<\/p>\n\n\n\n
            \u8ba2\u5355\u8868 orders_202406\u3001orders_202405\u3001orders_202404<\/pre>\n\n\n\n
            \u6e05\u74062024\u5e744\u6708\u7684\u8ba2\u5355\uff1f\u76f4\u63a5DROP TABLE orders_202404\uff0c\u560e\u5623\u8106\uff0c\u4e0d\u8d70DELETE\u903b\u8f91\uff0c\u5e72\u51c0\u76f4\u63a5\u3002<\/p>\n\n\n\n
            DELETE\u4e0d\u662f\u9519\uff0c\u9519\u7684\u662f\u4f60\u6ca1\u641e\u6e05\u695a\u4f60\u7684\u5e93\u503c\u591a\u5c11\u94b1<\/strong><\/p>\n\n\n\n
            \n\n\n\n
            MySQL\u662f\u4f60\u7528\u7684\u6700\u4e45\u7684\u670b\u53cb\uff0c\u5374\u4e5f\u6700\u5bb9\u6613\u88ab\u4f60\u8f7b\u89c6\u3002\u4f60\u8bf4DELETE\u5c31\u662f\u5220\u9664\uff0c\u90a3\u4f60\u53ef\u771f\u628a\u81ea\u5df1\u5f53CRUD Boy\u4e86\u3002<\/p>\n\n\n\n
            \u4f60\u5f97\u95ee\u95ee\u81ea\u5df1\uff1a<\/p>\n\n\n\n
              \n
            • \u8fd9\u5f20\u8868\u591a\u5927\uff1f<\/li>\n\n\n\n
            • \u6709\u591a\u5c11\u884c\uff1f<\/li>\n\n\n\n
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