{"id":141941,"date":"2024-10-31T22:11:19","date_gmt":"2024-10-31T14:11:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/141941\/"},"modified":"2024-10-31T22:11:20","modified_gmt":"2024-10-31T14:11:20","slug":"sql-update-%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%a4%9a%e8%a1%a8%e6%9b%b4%e6%96%b0%e8%a9%a6%e9%a9%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/141941\/","title":{"rendered":"SQL UPDATE \u8a9e\u53e5\u7684\u591a\u8868\u66f4\u65b0\u8a66\u9a57"},"content":{"rendered":"<h1 id=\"sql-update-%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%a4%9a%e8%a1%a8%e6%9b%b4%e6%96%b0%e8%a9%a6%e9%a9%97-LIHJABypth\">SQL UPDATE \u8a9e\u53e5\u7684\u591a\u8868\u66f4\u65b0\u8a66\u9a57<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u64cd\u4f5c\u548c\u7ba1\u7406\u8cc7\u6599\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u7576\u9700\u8981\u66f4\u65b0\u8cc7\u6599\u6642\uff0c<code>UPDATE<\/code> \u8a9e\u53e5\u662f\u6700\u5e38\u7528\u7684\u5de5\u5177\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u591a\u500b\u8868\u4e2d\u9032\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"sql-update-%e8%aa%9e%e5%8f%a5%e6%a6%82%e8%bf%b0-LIHJABypth\">SQL UPDATE \u8a9e\u53e5\u6982\u8ff0<\/h2>\n<p><code>UPDATE<\/code> \u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UPDATE \u8868\u540d\nSET \u6b04\u4f4d1 = \u503c1, \u6b04\u4f4d2 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>SET<\/code> \u5b50\u53e5\u7528\u65bc\u6307\u5b9a\u8981\u66f4\u65b0\u7684\u6b04\u4f4d\u53ca\u5176\u65b0\u503c\uff0c\u800c <code>WHERE<\/code> \u5b50\u53e5\u5247\u7528\u65bc\u9650\u5236\u66f4\u65b0\u7684\u7bc4\u570d\u3002\u82e5\u672a\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\uff0c\u5247\u6240\u6709\u8a18\u9304\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e8%a1%a8%e6%9b%b4%e6%96%b0%e7%9a%84%e9%9c%80%e6%b1%82-LIHJABypth\">\u591a\u8868\u66f4\u65b0\u7684\u9700\u6c42<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u540c\u6642\u66f4\u65b0\u591a\u500b\u8868\u4e2d\u7684\u8cc7\u6599\u3002\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u8868\u4e2d\u7684\u8cc7\u6599\u8b8a\u66f4\u6703\u5f71\u97ff\u5230\u53e6\u4e00\u500b\u8868\u6642\uff0c\u9019\u7a2e\u60c5\u6cc1\u5c31\u6703\u767c\u751f\u3002\u9019\u6642\u5019\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 SQL \u7684 <code>JOIN<\/code> \u8a9e\u53e5\u4f86\u5be6\u73fe\u591a\u8868\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-join-%e9%80%b2%e8%a1%8c%e5%a4%9a%e8%a1%a8%e6%9b%b4%e6%96%b0-LIHJABypth\">\u4f7f\u7528 JOIN \u9032\u884c\u591a\u8868\u66f4\u65b0<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 <code>JOIN<\/code> \u9032\u884c\u591a\u8868\u66f4\u65b0\u7684\u7bc4\u4f8b\u3002\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<code>customers<\/code>\uff08\u5ba2\u6236\u8868\uff09\u548c <code>orders<\/code>\uff08\u8a02\u55ae\u8868\uff09\u3002\u6211\u5011\u5e0c\u671b\u6839\u64da\u5ba2\u6236\u7684 ID \u66f4\u65b0\u8a02\u55ae\u7684\u72c0\u614b\u3002<\/p>\n<pre><code>UPDATE orders\nSET status = '\u5df2\u767c\u8ca8'\nFROM orders\nJOIN customers ON orders.customer_id = customers.id\nWHERE customers.region = '\u9999\u6e2f';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5c07\u6240\u6709\u4f86\u81ea\u300c\u9999\u6e2f\u300d\u5730\u5340\u7684\u5ba2\u6236\u7684\u8a02\u55ae\u72c0\u614b\u66f4\u65b0\u70ba\u300c\u5df2\u767c\u8ca8\u300d\u3002\u9019\u6a23\u7684\u64cd\u4f5c\u53ef\u4ee5\u78ba\u4fdd\u6211\u5011\u53ea\u66f4\u65b0\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-LIHJABypth\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u8cc7\u6599\u5b8c\u6574\u6027\uff1a<\/strong>\u5728\u9032\u884c\u591a\u8868\u66f4\u65b0\u6642\uff0c\u5fc5\u9808\u78ba\u4fdd\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u4f86\u9650\u5236\u66f4\u65b0\u7bc4\u570d\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u591a\u8868\u66f4\u65b0\u53ef\u80fd\u6703\u5f71\u97ff\u8cc7\u6599\u5eab\u7684\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u8cc7\u6599\u6642\u3002\u56e0\u6b64\uff0c\u5efa\u8b70\u5728\u9ad8\u5cf0\u671f\u4ee5\u5916\u7684\u6642\u9593\u9032\u884c\u6b64\u985e\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u5099\u4efd\u8cc7\u6599\uff1a<\/strong>\u5728\u9032\u884c\u4efb\u4f55\u66f4\u65b0\u64cd\u4f5c\u4e4b\u524d\uff0c\u52d9\u5fc5\u5099\u4efd\u8cc7\u6599\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u640d\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-LIHJABypth\">\u7d50\u8ad6<\/h2>\n<p>SQL \u7684 <code>UPDATE<\/code> \u8a9e\u53e5\u5728\u591a\u8868\u66f4\u65b0\u4e2d\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u529f\u80fd\uff0c\u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u548c\u66f4\u65b0\u8cc7\u6599\u3002\u900f\u904e\u4f7f\u7528 <code>JOIN<\/code> \u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u6839\u64da\u4e0d\u540c\u7684\u689d\u4ef6\u540c\u6642\u66f4\u65b0\u591a\u500b\u8868\u4e2d\u7684\u8cc7\u6599\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u64cd\u4f5c\u7684\u6548\u7387\uff0c\u4e5f\u78ba\u4fdd\u4e86\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u8cc7\u6599\u5eab\u7ba1\u7406\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u65b9\u6848\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u4f01\u696d\u9084\u662f\u5927\u578b\u6a5f\u69cb\uff0c<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u63d0\u4f9b\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 SQL UPDATE \u8a9e\u53e5\u5728\u591a\u8868\u66f4\u65b0\u4e2d\u7684\u61c9\u7528\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u4fee\u6539\u591a\u500b\u8868\u683c\u4e2d\u7684\u6578\u64da\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-141941","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141941","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=141941"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141941\/revisions"}],"predecessor-version":[{"id":141942,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/141941\/revisions\/141942"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=141941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=141941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=141941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}