{"id":200402,"date":"2025-05-06T09:29:13","date_gmt":"2025-05-06T01:29:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200402\/"},"modified":"2025-05-06T09:29:13","modified_gmt":"2025-05-06T01:29:13","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-mysql-%e6%89%b9%e9%87%8f%e4%bf%ae%e6%94%b9%e6%95%b0%e6%8d%ae%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200402\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 MySQL \u6279\u91cf\u4fee\u6539\u6570\u636e\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528 MySQL \u6279\u91cf\u4fee\u6539\u6570\u636e\uff1f<\/h1>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

<\/p>\n

\u5982\u4f55\u4f7f\u7528 mysql \u6279\u91cf\u4fee\u6539\u6570\u636e<\/strong><\/p>\n

\u5728 mysql \u4e2d\uff0c\u5982\u679c\u60a8\u9700\u8981\u6279\u91cf\u4fee\u6539\u8868\u4e2d\u7684\u4e00\u5217\u6570\u636e\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 update \u8bed\u53e5\u3002<\/p>\n

\u793a\u4f8b<\/strong><\/p>\n

\u5047\u8bbe\u60a8\u6709\u4e00\u4e2a\u540d\u4e3a users \u7684\u8868\uff0c\u5176\u4e2d\u6709\u4e00\u5217\u540d\u4e3a status\u3002\u8981\u5c06\u6240\u6709 status \u5217\u503c\u4e3a a \u7684\u884c\u4fee\u6539\u4e3a b\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8be2\uff1a<\/p>\n

update users\nset status = 'b'\nwhere status = 'a';<\/pre>\n
\u8be5\u67e5\u8be2\u5c06\u66f4\u65b0 users \u8868\u4e2d\u6240\u6709 status \u5217\u503c\u4e3a a \u7684\u884c\uff0c\u5c06\u5b83\u4eec\u4fee\u6539\u4e3a b\u3002<\/p>\n
\u66f4\u8be6\u7ec6\u7684\u8bed\u6cd5<\/strong><\/p>\n
update \u8bed\u53e5\u7684\u5b8c\u6574\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
UPDATE <table_name>\nSET <column_name> = <new_value>\n[WHERE <condition>];<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • <table_name> \u662f\u60a8\u8981\u4fee\u6539\u7684\u8868\u7684\u540d\u79f0\u3002<\/li>\n
  • <column_name> \u662f\u60a8\u8981\u4fee\u6539\u7684\u5217\u7684\u540d\u79f0\u3002<\/li>\n
  • <new_value> \u662f\u60a8\u8981\u5c06\u5217\u503c\u4fee\u6539\u4e3a\u7684\u65b0\u503c\u3002<\/li>\n
  • [where <condition>] \u662f\u53ef\u9009\u9879\uff0c\u7528\u4e8e\u6307\u5b9a\u7b5b\u9009\u8981\u4fee\u6539\u7684\u884c\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u4e3b\u673a\u5b9d\u8d1d\uff01\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u3002<\/p>\n
    \n
    \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u4f7f\u7528 MySQL \u6279\u91cf\u4fee\u6539\u6570...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200402","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200402"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200402\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}