{"id":195897,"date":"2024-11-13T18:49:21","date_gmt":"2024-11-13T10:49:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/195897\/"},"modified":"2024-11-13T18:49:22","modified_gmt":"2024-11-13T10:49:22","slug":"%e6%80%8e%e9%ba%bc%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a3%a1%e7%9a%84%e6%95%b8%e6%93%9a%ef%bc%9f-%e5%a6%82%e4%bd%95%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/195897\/","title":{"rendered":"\u600e\u9ebc\u66f4\u65b0\u6578\u64da\u5eab\u88e1\u7684\u6578\u64da\uff1f (\u5982\u4f55\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da)"},"content":{"rendered":"<h1 id=\"%e6%80%8e%e9%ba%bc%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a3%a1%e7%9a%84%e6%95%b8%e6%93%9a%ef%bc%9f-OfbnepBXCr\">\u600e\u9ebc\u66f4\u65b0\u6578\u64da\u5eab\u88e1\u7684\u6578\u64da\uff1f<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u662f\u5b58\u5132\u548c\u7ba1\u7406\u6578\u64da\u7684\u6838\u5fc3\u7d44\u4ef6\u3002\u7121\u8ad6\u662f\u7db2\u7ad9\u3001\u79fb\u52d5\u61c9\u7528\u9084\u662f\u4f01\u696d\u7cfb\u7d71\uff0c\u6578\u64da\u5eab\u7684\u66f4\u65b0\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u6709\u6548\u5730\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9b%b4%e6%96%b0%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-OfbnepBXCr\">\u6578\u64da\u5eab\u66f4\u65b0\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528 SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u4f86\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u3002\u6700\u5e38\u898b\u7684 SQL \u66f4\u65b0\u8a9e\u53e5\u662f <code>UPDATE<\/code> \u8a9e\u53e5\u3002\u9019\u500b\u8a9e\u53e5\u5141\u8a31\u7528\u6236\u4fee\u6539\u6578\u64da\u8868\u4e2d\u7684\u73fe\u6709\u8a18\u9304\u3002<\/p>\n<h3 id=\"update-%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-OfbnepBXCr\">UPDATE \u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5<\/h3>\n<pre><code>UPDATE \u8868\u540d\nSET \u52171 = \u503c1, \u52172 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>\u8868\u540d<\/code> \u662f\u4f60\u60f3\u8981\u66f4\u65b0\u7684\u6578\u64da\u8868\uff0c<code>SET<\/code> \u5b50\u53e5\u7528\u4f86\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u5217\u53ca\u5176\u65b0\u503c\uff0c\u800c <code>WHERE<\/code> \u5b50\u53e5\u5247\u7528\u4f86\u6307\u5b9a\u54ea\u4e9b\u8a18\u9304\u9700\u8981\u88ab\u66f4\u65b0\u3002\u6c92\u6709 <code>WHERE<\/code> \u5b50\u53e5\u7684\u8a71\uff0c\u6240\u6709\u8a18\u9304\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e7%9a%84%e5%af%a6%e9%9a%9b%e7%a4%ba%e4%be%8b-OfbnepBXCr\">\u66f4\u65b0\u6578\u64da\u7684\u5be6\u969b\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>users<\/code> \u7684\u6578\u64da\u8868\uff0c\u8a72\u8868\u5305\u542b\u7528\u6236\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u5982\u7528\u6236\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u66f4\u65b0\u7279\u5b9a\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>UPDATE users\nSET email = 'newemail@example.com'\nWHERE username = 'john_doe';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u6703\u628a\u7528\u6236\u540d\u70ba <code>john_doe<\/code> \u7684\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u66f4\u65b0\u70ba <code>newemail@example.com<\/code>\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99%e4%be%86%e7%a2%ba%e4%bf%9d%e6%95%b8%e6%93%9a%e4%b8%80%e8%87%b4%e6%80%a7-OfbnepBXCr\">\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027<\/h3>\n<p>\u5728\u9032\u884c\u6578\u64da\u66f4\u65b0\u6642\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u8868\u6216\u591a\u500b\u64cd\u4f5c\u7684\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u4e8b\u52d9\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\uff0c\u5f9e\u800c\u4fdd\u6301\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<pre><code>BEGIN;\n\nUPDATE users\nSET email = 'newemail@example.com'\nWHERE username = 'john_doe';\n\nUPDATE orders\nSET status = 'updated'\nWHERE user_id = (SELECT id FROM users WHERE username = 'john_doe');\n\nCOMMIT;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\uff0c\u7136\u5f8c\u66f4\u65b0\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff0c\u63a5\u8457\u66f4\u65b0\u8207\u8a72\u7528\u6236\u76f8\u95dc\u7684\u8a02\u55ae\u72c0\u614b\u3002\u6700\u5f8c\uff0c\u6211\u5011\u63d0\u4ea4\u4e8b\u52d9\uff0c\u78ba\u4fdd\u6240\u6709\u66f4\u6539\u90fd\u88ab\u4fdd\u5b58\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-OfbnepBXCr\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u59cb\u7d42\u4f7f\u7528 WHERE \u5b50\u53e5\uff1a<\/strong>\u5728\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\u6642\uff0c\u52d9\u5fc5\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u4f86\u9650\u5236\u66f4\u65b0\u7684\u7bc4\u570d\uff0c\u4ee5\u907f\u514d\u610f\u5916\u66f4\u65b0\u6240\u6709\u8a18\u9304\u3002<\/li>\n<li><strong>\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u5728\u9032\u884c\u5927\u898f\u6a21\u66f4\u65b0\u4e4b\u524d\uff0c\u5efa\u8b70\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u6216\u640d\u58de\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u66f4\u65b0\u8a9e\u53e5\uff1a<\/strong>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u57f7\u884c\u66f4\u65b0\u8a9e\u53e5\u4e4b\u524d\uff0c\u61c9\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u9032\u884c\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u5176\u6b63\u78ba\u6027\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5c0d\u65bc\u6d89\u53ca\u591a\u500b\u6b65\u9a5f\u7684\u66f4\u65b0\u64cd\u4f5c\uff0c\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-OfbnepBXCr\">\u7e3d\u7d50<\/h2>\n<p>\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u662f\u4e00\u9805\u57fa\u672c\u800c\u91cd\u8981\u7684\u64cd\u4f5c\uff0c\u6b63\u78ba\u7684\u4f7f\u7528 SQL \u8a9e\u53e5\u548c\u9075\u5faa\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <code>UPDATE<\/code> \u8a9e\u53e5\u9084\u662f\u4e8b\u52d9\uff0c\u4e86\u89e3\u5982\u4f55\u5b89\u5168\u5730\u66f4\u65b0\u6578\u64da\u90fd\u662f\u6bcf\u4f4d\u958b\u767c\u8005\u5fc5\u5099\u7684\u6280\u80fd\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4f86\u63d0\u5347\u60a8\u7684\u6578\u64da\u5eab\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u5305\u62ec\u4f7f\u7528SQL\u8a9e\u53e5\u3001\u6578\u64da\u5eab\u7ba1\u7406\u5de5\u5177\u53ca\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-195897","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195897","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=195897"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195897\/revisions"}],"predecessor-version":[{"id":195898,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195897\/revisions\/195898"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=195897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=195897"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=195897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}