{"id":199699,"date":"2025-05-06T10:19:36","date_gmt":"2025-05-06T02:19:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199699\/"},"modified":"2025-05-06T10:19:36","modified_gmt":"2025-05-06T02:19:36","slug":"%e4%b8%89%e7%a7%8dupdate%e8%af%ad%e5%8f%a5%e5%9c%a8sql%e4%b8%ad%e7%9a%84%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199699\/","title":{"rendered":"\u4e09\u79cdupdate\u8bed\u53e5\u5728SQL\u4e2d\u7684\u7528\u6cd5"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u4e09\u79cdupdate\u8bed\u53e5\u5728SQL\u4e2d\u7684\u7528\u6cd5<\/h1>\n<p>\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n<p>SQL\u7684update\u8bed\u53e5\u4e09\u79cd\u7528\u6cd5\uff0c\u9700\u8981\u5177\u4f53\u4ee3\u7801\u793a\u4f8b<\/p>\n<p>\u5728SQL\u4e2d\uff0cupdate\u8bed\u53e5\u7528\u4e8e\u66f4\u65b0\u8868\u4e2d\u7684\u6570\u636e\u3002\u5b83\u662f\u4e00\u79cd\u975e\u5e38\u6709\u7528\u7684\u8bed\u53e5\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u65b0\u8868\u4e2d\u7684\u7279\u5b9a\u6570\u636e\u6216\u8005\u6279\u91cf\u66f4\u65b0\u591a\u6761\u6570\u636e\u3002\u4e0b\u9762\u5c06\u4ecb\u7ecdupdate\u8bed\u53e5\u7684\u4e09\u79cd\u5e38\u89c1\u7528\u6cd5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<p>\u7b2c\u4e00\u79cd\u7528\u6cd5\uff1a\u66f4\u65b0\u5355\u6761\u6570\u636e<br \/>\u6700\u5e38\u89c1\u7684\u7528\u6cd5\u662f\u66f4\u65b0\u8868\u4e2d\u7684\u4e00\u6761\u8bb0\u5f55\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre>UPDATE \u8868\u540d\nSET \u5217\u540d1 = \u503c1, \u5217\u540d2 = \u503c2, ...\nWHERE \u6761\u4ef6;<\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a&#8221;students&#8221;\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e09\u4e2a\u5217\uff08id\u3001name\u548cage\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528update\u6765\u66f4\u65b0\u67d0\u4e2a\u5b66\u751f\u7684\u5e74\u9f84\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>UPDATE students\nSET age = 20\nWHERE id = 1;<\/pre>\n<p>\u8fd9\u4e2a\u8bed\u53e5\u5c06\u4f1a\u5c06id\u4e3a1\u7684\u5b66\u751f\u7684\u5e74\u9f84\u66f4\u65b0\u4e3a20\u3002<\/p>\n<p>\u7b2c\u4e8c\u79cd\u7528\u6cd5\uff1a\u66f4\u65b0\u591a\u6761\u6570\u636e<br \/>\u6709\u65f6\u5019\uff0c\u6211\u4eec\u9700\u8981\u4e00\u6b21\u6027\u66f4\u65b0\u591a\u6761\u8bb0\u5f55\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528update\u8bed\u53e5\u7684where\u6761\u4ef6\u6765\u9009\u62e9\u9700\u8981\u66f4\u65b0\u7684\u8bb0\u5f55\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre>UPDATE \u8868\u540d\nSET \u5217\u540d1 = \u503c1, \u5217\u540d2 = \u503c2, ...\nWHERE \u6761\u4ef6;<\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u9700\u8981\u5c06\u5e74\u9f84\u5c0f\u4e8e18\u5c81\u7684\u5b66\u751f\u5e74\u9f84\u90fd\u66f4\u65b0\u4e3a18\u5c81\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre>UPDATE students\nSET age = 18\nWHERE age &lt; 18;<\/pre>\n<p>\u8fd9\u4e2a\u8bed\u53e5\u5c06\u4f1a\u5c06\u6240\u6709\u5e74\u9f84\u5c0f\u4e8e18\u5c81\u7684\u5b66\u751f\u7684\u5e74\u9f84\u66f4\u65b0\u4e3a18\u5c81\u3002<\/p>\n<p>\u7b2c\u4e09\u79cd\u7528\u6cd5\uff1a\u66f4\u65b0\u6570\u636e\u8868\u7684\u4e00\u4e2a\u5217<br \/>\u6709\u65f6\u5019\uff0c\u6211\u4eec\u53ea\u60f3\u66f4\u65b0\u8868\u4e2d\u7684\u4e00\u4e2a\u7279\u5b9a\u5217\uff0c\u800c\u4e0d\u662f\u6574\u4e2a\u8bb0\u5f55\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre>UPDATE \u8868\u540d\nSET \u5217\u540d = \u503c;<\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u60f3\u5c06\u5b66\u751f\u8868\u4e2d\u7684\u6240\u6709\u59d3\u540d\u66f4\u65b0\u4e3a&#8221;\u5f20\u4e09&#8221;\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre>UPDATE students\nSET name = '\u5f20\u4e09';<\/pre>\n<p>\u8fd9\u4e2a\u8bed\u53e5\u5c06\u4f1a\u5c06\u6240\u6709\u5b66\u751f\u7684\u59d3\u540d\u90fd\u66f4\u65b0\u4e3a&#8221;\u5f20\u4e09&#8221;\u3002<\/p>\n<p>\u603b\u7ed3\uff1a<br \/>update\u8bed\u53e5\u662fSQL\u4e2d\u7528\u4e8e\u66f4\u65b0\u8868\u4e2d\u6570\u636e\u7684\u91cd\u8981\u8bed\u53e5\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e86update\u8bed\u53e5\u7684\u4e09\u79cd\u5e38\u89c1\u7528\u6cd5\uff0c\u5e76\u7ed9\u51fa\u4e86\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u901a\u8fc7\u5b66\u4e60\u8fd9\u4e9b\u7528\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u548c\u66f4\u65b0\u8868\u4e2d\u7684\u6570\u636e\u3002<\/p>\n<p>\u6587\u4e2d\u5173\u4e8eUpdate,SQL,\u8bed\u53e5\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u4e09\u79cdupdate\u8bed\u53e5\u5728SQL\u4e2d\u7684\u7528\u6cd5\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u4e09\u79cdupdate\u8bed\u53e5\u5728SQL\u4e2d\u7684&#46;&#46;&#46;<\/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-199699","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199699","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=199699"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199699\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}