{"id":7572,"date":"2024-11-14T10:24:17","date_gmt":"2024-11-14T02:24:17","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7572\/"},"modified":"2024-11-14T10:24:17","modified_gmt":"2024-11-14T02:24:17","slug":"mysql-update-%e7%9a%84%e5%ba%95%e5%b1%82%e9%80%bb%e8%be%91%e5%92%8c%e6%89%b9%e9%87%8f%e6%9b%b4%e6%96%b0%e6%80%a7%e8%83%bd%ef%bc%9a%e5%a6%82%e4%bd%95%e4%bc%98%e5%8c%96%e5%a4%a7%e8%a7%84%e6%a8%a1","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7572\/","title":{"rendered":"MySQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u548c\u6279\u91cf\u66f4\u65b0\u6027\u80fd\uff1a\u5982\u4f55\u4f18\u5316\u5927\u89c4\u6a21\u66f4\u65b0\u64cd\u4f5c\uff1f"},"content":{"rendered":"

\"MySQL<\/p>\n

MySQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u548c\u6279\u91cf\u66f4\u65b0\u6027\u80fd<\/strong><\/p>\n

\u5f53\u6267\u884c\u4e00\u4e2a UPDATE \u8bed\u53e5\u65f6\uff0cMySQL \u4f1a\u9075\u5faa\u4ee5\u4e0b\u5e95\u5c42\u903b\u8f91\uff1a<\/p>\n

    \n
  1. \u67e5\u8be2\u65e7\u884c\uff1a<\/strong>MySQL \u4f1a\u8bfb\u53d6\u53d7\u5f71\u54cd\u884c\u7684\u5f53\u524d\u503c\uff0c\u4ee5\u786e\u5b9a\u662f\u5426\u9700\u8981\u66f4\u65b0\u3002<\/li>\n
  2. \u8ba1\u7b97\u65b0\u503c\uff1a<\/strong>\u6839\u636e\u63d0\u4f9b\u7684 SET \u5b50\u53e5\u8ba1\u7b97\u6bcf\u4e2a\u53d7\u5f71\u54cd\u884c\u7684\u65b0\u503c\u3002<\/li>\n
  3. \u66f4\u65b0\u7d22\u5f15\uff1a<\/strong>\u66f4\u65b0\u6240\u6709\u53d7\u8be5 UPDATE \u5f71\u54cd\u7684\u7d22\u5f15\uff0c\u4ee5\u53cd\u6620\u65b0\u503c\u3002<\/li>\n
  4. \u66f4\u65b0\u884c\uff1a<\/strong>\u5c06\u8ba1\u7b97\u51fa\u7684\u65b0\u503c\u5199\u5165\u53d7\u5f71\u54cd\u884c\u3002<\/li>\n<\/ol>\n

    \u6279\u91cf\u66f4\u65b0\u6027\u80fd<\/strong><\/p>\n

    \u6279\u91cf\u66f4\u65b0\u7684\u6027\u80fd\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n

      \n
    • \u6570\u636e\u884c\u6570\uff1a<\/strong>\u884c\u6570\u8d8a\u5927\uff0c\u66f4\u65b0\u6240\u9700\u7684\u65f6\u95f4\u5c31\u8d8a\u957f\u3002<\/li>\n
    • \u66f4\u65b0\u8303\u56f4\uff1a<\/strong>\u5982\u679c\u66f4\u65b0\u9700\u8981\u4fee\u6539\u591a\u5217\u6216\u8de8\u8d8a\u591a\u4e2a\u8868\uff0c\u6027\u80fd\u53ef\u80fd\u4f1a\u4e0b\u964d\u3002<\/li>\n
    • \u7d22\u5f15\uff1a<\/strong>\u9002\u5f53\u7684\u7d22\u5f15\u53ef\u4ee5\u663e\u7740\u63d0\u9ad8\u6279\u91cf\u66f4\u65b0\u6027\u80fd\u3002<\/li>\n
    • \u8fde\u63a5\u6570\uff1a<\/strong>\u9ad8\u8fde\u63a5\u6570\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e89\u7528\u548c\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<\/ul>\n

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

      \u5728\u4e8b\u52a1\u5185\u6267\u884c\u5927\u6279\u91cf\u66f4\u65b0\u53ef\u80fd\u4f1a\u589e\u52a0\u6b7b\u9501\u98ce\u9669\uff0c\u56e0\u4e3a\uff1a<\/p>\n

        \n
      • \u591a\u4e2a\u4f1a\u8bdd\u53ef\u4ee5\u540c\u65f6\u5c1d\u8bd5\u66f4\u65b0\u540c\u4e00\u884c\u3002<\/li>\n
      • \u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4e8b\u52a1\u53ef\u4ee5\u963b\u6b62\u5176\u4ed6\u4f1a\u8bdd\u8bbf\u95ee\u540c\u4e00\u884c\u3002<\/li>\n<\/ul>\n

        \u4e3a\u4e86\u964d\u4f4e\u6b7b\u9501\u98ce\u9669\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a<\/p>\n

          \n
        • \u4f7f\u7528\u4f4e\u9694\u79bb\u7ea7\u522b\uff0c\u4f8b\u5982 READ COMMITTED\u3002<\/li>\n
        • \u4f7f\u7528 OPTIMIZE FOR QUERY \u9009\u9879\u6765\u5f3a\u5236\u65e9\u91ca\u653e\u9501\u3002<\/li>\n
        • \u5206\u6279\u66f4\u65b0\u6570\u636e\uff0c\u4e00\u6b21\u66f4\u65b0\u8f83\u5c0f\u7684\u6570\u636e\u5757\u3002<\/li>\n<\/ul>\n

          \u4ee5\u4e0a\u5c31\u662fMySQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u548c\u6279\u91cf\u66f4\u65b0\u6027\u80fd\uff1a\u5982\u4f55\u4f18\u5316\u5927\u89c4\u6a21\u66f4\u65b0\u64cd\u4f5c\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 UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u548c\u6279\u91cf\u66f4\u65b0\u6027\u80fd \u5f53\u6267\u884c\u4e00\u4e2a UPDATE \u8bed\u53e5\u65f6\uff0cMySQL \u4f1a\u9075\u5faa\u4ee5\u4e0b\u5e95\u5c42\u903b\u8f91\uff1a \u67e5\u8be2\u65e7\u884c\uff1aMySQL \u4f1a\u8bfb\u53d6\u53d7\u5f71\u54cd\u884c\u7684\u5f53\u524d\u503c\uff0c\u4ee5\u786e\u5b9a\u662f\u5426\u9700\u8981\u66f4\u65b0\u3002 \u8ba1\u7b97\u65b0\u503c\uff1a\u6839\u636e\u63d0\u4f9b\u7684 SET \u5b50\u53e5\u8ba1\u7b97\u6bcf\u4e2a\u53d7\u5f71\u54cd\u884c\u7684\u65b0\u503c\u3002 \u66f4\u65b0\u7d22\u5f15\uff1a\u66f4\u65b0\u6240\u6709\u53d7\u8be5 UPDATE \u5f71\u54cd\u7684\u7d22\u5f15\uff0c\u4ee5\u53cd\u6620\u65b0\u503c\u3002 \u66f4\u65b0\u884c\uff1a\u5c06\u8ba1\u7b97\u51fa\u7684\u65b0\u503c\u5199\u5165\u53d7\u5f71\u54cd\u884c\u3002 \u6279\u91cf\u66f4\u65b0\u6027\u80fd \u6279\u91cf\u66f4\u65b0\u7684\u6027\u80fd\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a \u6570\u636e\u884c\u6570\uff1a\u884c\u6570\u8d8a\u5927\uff0c\u66f4\u65b0\u6240\u9700\u7684\u65f6\u95f4\u5c31\u8d8a\u957f\u3002 \u66f4\u65b0\u8303\u56f4\uff1a\u5982\u679c\u66f4\u65b0\u9700\u8981\u4fee\u6539\u591a\u5217\u6216\u8de8\u8d8a\u591a\u4e2a\u8868\uff0c\u6027\u80fd\u53ef\u80fd\u4f1a\u4e0b\u964d\u3002 \u7d22\u5f15\uff1a\u9002\u5f53\u7684\u7d22\u5f15\u53ef\u4ee5\u663e\u7740\u63d0\u9ad8\u6279\u91cf\u66f4\u65b0\u6027\u80fd\u3002 \u8fde\u63a5\u6570\uff1a\u9ad8\u8fde\u63a5\u6570\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e89\u7528\u548c\u6027\u80fd\u95ee\u9898\u3002 \u6b7b\u9501\u98ce\u9669 \u5728\u4e8b\u52a1\u5185\u6267\u884c\u5927\u6279\u91cf\u66f4\u65b0\u53ef\u80fd\u4f1a\u589e\u52a0\u6b7b\u9501\u98ce\u9669\uff0c\u56e0\u4e3a\uff1a \u591a\u4e2a\u4f1a\u8bdd\u53ef\u4ee5\u540c\u65f6\u5c1d\u8bd5\u66f4\u65b0\u540c\u4e00\u884c\u3002 \u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4e8b\u52a1\u53ef\u4ee5\u963b\u6b62\u5176\u4ed6\u4f1a\u8bdd\u8bbf\u95ee\u540c\u4e00\u884c\u3002 \u4e3a\u4e86\u964d\u4f4e\u6b7b\u9501\u98ce\u9669\uff0c\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a \u4f7f\u7528\u4f4e\u9694\u79bb\u7ea7\u522b\uff0c\u4f8b\u5982 READ COMMITTED\u3002 \u4f7f\u7528 OPTIMIZE FOR QUERY \u9009\u9879\u6765\u5f3a\u5236\u65e9\u91ca\u653e\u9501\u3002 \u5206\u6279\u66f4\u65b0\u6570\u636e\uff0c\u4e00\u6b21\u66f4\u65b0\u8f83\u5c0f\u7684\u6570\u636e\u5757\u3002 \u4ee5\u4e0a\u5c31\u662fMySQL UPDATE \u7684\u5e95\u5c42\u903b\u8f91\u548c\u6279\u91cf\u66f4\u65b0\u6027\u80fd\uff1a\u5982\u4f55\u4f18\u5316\u5927\u89c4\u6a21\u66f4\u65b0\u64cd\u4f5c\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},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7572","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7572","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=7572"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7572\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7572"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7572"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7572"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}