{"id":7711,"date":"2024-11-14T12:56:27","date_gmt":"2024-11-14T04:56:27","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7711\/"},"modified":"2024-11-14T12:56:27","modified_gmt":"2024-11-14T04:56:27","slug":"mysql-update-%e8%af%ad%e5%8f%a5%ef%bc%9a%e5%a6%82%e4%bd%95%e6%8f%90%e5%8d%87%e6%95%88%e7%8e%87%e5%b9%b6%e9%81%bf%e5%85%8d%e6%ad%bb%e9%94%81%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7711\/","title":{"rendered":"MySQL UPDATE \u8bed\u53e5\uff1a\u5982\u4f55\u63d0\u5347\u6548\u7387\u5e76\u907f\u514d\u6b7b\u9501\uff1f"},"content":{"rendered":"

\"MySQL<\/p>\n

MySQL \u4e2d UPDATE \u8bed\u53e5\u7684\u5e95\u5c42\u903b\u8f91\u548c\u6027\u80fd\u4f18\u5316<\/strong><\/p>\n

\u5728 MySQL \u4e2d\u8fdb\u884c\u6570\u636e\u66f4\u65b0\u662f\u5e38\u89c1\u64cd\u4f5c\uff0c\u5176\u4e2d UPDATE \u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u8868\u4e2d\u6570\u636e\u7684\u7279\u5b9a\u503c\u3002\u5f53\u6d89\u53ca\u5927\u91cf\u6570\u636e\u65f6\uff0c\u7406\u89e3\u8bed\u53e5\u7684\u5e95\u5c42\u903b\u8f91\u548c\u91c7\u7528\u5408\u9002\u7684\u6027\u80fd\u4f18\u5316\u63aa\u65bd\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

\u5e95\u5c42\u903b\u8f91<\/strong><\/p>\n

\u5f53\u6267\u884c UPDATE \u8bed\u53e5\u65f6\uff0cMySQL \u4f1a\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n

    \n
  1. \u786e\u5b9a\u9700\u8981\u66f4\u65b0\u7684\u884c\uff1a<\/strong>\u89e3\u6790 UPDATE \u8bed\u53e5\u7684 WHERE \u5b50\u53e5\uff0c\u627e\u5230\u9700\u8981\u66f4\u65b0\u7684\u884c\u3002<\/li>\n
  2. \u83b7\u53d6\u884c\u9501\uff1a<\/strong>\u5728\u4e8b\u52a1\u73af\u5883\u4e2d\uff0cMySQL \u4f1a\u83b7\u53d6\u5df2\u627e\u5230\u884c\u4e0a\u7684\u9501\uff0c\u4ee5\u9632\u6b62\u5176\u4ed6\u4e8b\u52a1\u540c\u65f6\u66f4\u65b0\u8fd9\u4e9b\u884c\u3002<\/li>\n
  3. \u4fee\u6539\u884c\u6570\u636e\uff1a<\/strong>\u66f4\u65b0\u884c\u6570\u636e\u4ee5\u5339\u914d SET \u5b50\u53e5\u4e2d\u6307\u5b9a\u7684\u8868\u8fbe\u5f0f\u3002<\/li>\n
  4. \u91ca\u653e\u884c\u9501\uff1a<\/strong>\u4e00\u65e6\u6570\u636e\u66f4\u65b0\u5b8c\u6210\uff0cMySQL \u5c06\u91ca\u653e\u884c\u9501\u3002<\/li>\n<\/ol>\n

    \u6027\u80fd\u4f18\u5316<\/strong><\/p>\n

    \u5f53\u9700\u8981\u66f4\u65b0\u5927\u91cf\u884c\u65f6\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\u63d0\u9ad8\u6027\u80fd\uff1a<\/p>\n

      \n
    • \u5206\u533a\u8868\uff1a<\/strong>\u5982\u679c\u8868\u88ab\u5206\u533a\uff0c\u5219\u53ef\u4ee5\u5728\u6bcf\u4e2a\u5206\u533a\u4e0a\u5e76\u884c\u6267\u884c UPDATE \u64cd\u4f5c\u3002<\/li>\n
    • \u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>WHERE \u5b50\u53e5\u4e2d\uff0c\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u52a0\u5feb\u627e\u5230\u9700\u8981\u66f4\u65b0\u7684\u884c\u3002<\/li>\n
    • \u4f18\u5316 SET \u5b50\u53e5\uff1a<\/strong>\u4ec5\u4fee\u6539\u9700\u8981\u66f4\u65b0\u7684\u5217\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n
    • \u7f13\u5b58\u66f4\u65b0\uff1a<\/strong>\u5728\u4e8b\u52a1\u5f00\u59cb\u65f6\uff0cMySQL \u4f1a\u542f\u52a8\u4e00\u4e2a\u7f13\u51b2\u533a\u6765\u7f13\u5b58 UPDATE \u64cd\u4f5c\u3002\u8fd9\u53ef\u4ee5\u5c06\u591a\u6b21 UPDATE \u64cd\u4f5c\u5408\u5e76\u6210\u4e00\u4e2a\u64cd\u4f5c\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n
    • \u4f7f\u7528\u4e8b\u52a1\u6279\u91cf\u66f4\u65b0\uff1a<\/strong>\u4f7f\u7528\u4e8b\u52a1\u6765\u6279\u91cf\u66f4\u65b0\u6570\u636e\u53ef\u4ee5\u907f\u514d\u9891\u7e41\u63d0\u4ea4\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n

      \u6b7b\u9501\u98ce\u9669<\/strong><\/p>\n

      \u5728\u4e8b\u52a1\u73af\u5883\u4e2d\uff0c\u5f53\u591a\u4e2a\u4e8b\u52a1\u540c\u65f6\u8bd5\u56fe\u66f4\u65b0\u540c\u4e00\u884c\u65f6\uff0c\u53ef\u80fd\u4f1a\u53d1\u751f\u6b7b\u9501\u3002\u5f53\u6240\u6709\u4e8b\u52a1\u90fd\u7b49\u5f85\u5bf9\u65b9\u91ca\u653e\u884c\u9501\u65f6\uff0c\u5c31\u4f1a\u4ea7\u751f\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n

      \u4e3a\u7f13\u89e3\u6b7b\u9501\u98ce\u9669\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a<\/p>\n

        \n
      • \u9501\u5b9a\u987a\u5e8f\uff1a<\/strong>\u59cb\u7ec8\u6309\u7167\u76f8\u540c\u7684\u987a\u5e8f\u9501\u5b9a\u8868\u548c\u884c\uff0c\u4ee5\u907f\u514d\u4ea7\u751f\u6b7b\u9501\u3002<\/li>\n
      • \u8d85\u65f6\u673a\u5236\uff1a<\/strong>\u8bbe\u7f6e\u4e8b\u52a1\u8d85\u65f6\u65f6\u95f4\uff0c\u4ee5\u9632\u6b62\u4e8b\u52a1\u957f\u65f6\u95f4\u7b49\u5f85\u9501\u3002<\/li>\n
      • \u6b7b\u9501\u68c0\u6d4b\u548c\u6062\u590d\uff1a<\/strong>\u5b9e\u73b0\u6b7b\u9501\u68c0\u6d4b\u548c\u6062\u590d\u673a\u5236\uff0c\u4ee5\u81ea\u52a8\u68c0\u6d4b\u548c\u5904\u7406\u6b7b\u9501\u3002<\/li>\n<\/ul>\n

        \u4ee5\u4e0a\u5c31\u662fMySQL UPDATE \u8bed\u53e5\uff1a\u5982\u4f55\u63d0\u5347\u6548\u7387\u5e76\u907f\u514d\u6b7b\u9501\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

        MySQL \u4e2d UPDATE \u8bed\u53e5\u7684\u5e95\u5c42\u903b\u8f91\u548c\u6027\u80fd\u4f18\u5316 \u5728 MySQL \u4e2d\u8fdb\u884c\u6570\u636e\u66f4\u65b0\u662f\u5e38\u89c1\u64cd\u4f5c\uff0c\u5176\u4e2d UPDATE \u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u8868\u4e2d\u6570\u636e\u7684\u7279\u5b9a\u503c\u3002\u5f53\u6d89\u53ca\u5927\u91cf\u6570\u636e\u65f6\uff0c\u7406\u89e3\u8bed\u53e5\u7684\u5e95\u5c42\u903b\u8f91\u548c\u91c7\u7528\u5408\u9002\u7684\u6027\u80fd\u4f18\u5316\u63aa\u65bd\u81f3\u5173\u91cd\u8981\u3002 \u5e95\u5c42\u903b\u8f91 \u5f53\u6267\u884c UPDATE \u8bed\u53e5\u65f6\uff0cMySQL \u4f1a\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a \u786e\u5b9a\u9700\u8981\u66f4\u65b0\u7684\u884c\uff1a\u89e3\u6790 UPDATE \u8bed\u53e5\u7684 WHERE \u5b50\u53e5\uff0c\u627e\u5230\u9700\u8981\u66f4\u65b0\u7684\u884c\u3002 \u83b7\u53d6\u884c\u9501\uff1a\u5728\u4e8b\u52a1\u73af\u5883\u4e2d\uff0cMySQL 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\u5b50\u53e5\uff1a\u4ec5\u4fee\u6539\u9700\u8981\u66f4\u65b0\u7684\u5217\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u66f4\u65b0\u64cd\u4f5c\u3002 \u7f13\u5b58\u66f4\u65b0\uff1a\u5728\u4e8b\u52a1\u5f00\u59cb\u65f6\uff0cMySQL \u4f1a\u542f\u52a8\u4e00\u4e2a\u7f13\u51b2\u533a\u6765\u7f13\u5b58 UPDATE \u64cd\u4f5c\u3002\u8fd9\u53ef\u4ee5\u5c06\u591a\u6b21 UPDATE \u64cd\u4f5c\u5408\u5e76\u6210\u4e00\u4e2a\u64cd\u4f5c\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002 \u4f7f\u7528\u4e8b\u52a1\u6279\u91cf\u66f4\u65b0\uff1a\u4f7f\u7528\u4e8b\u52a1\u6765\u6279\u91cf\u66f4\u65b0\u6570\u636e\u53ef\u4ee5\u907f\u514d\u9891\u7e41\u63d0\u4ea4\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002 \u6b7b\u9501\u98ce\u9669 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