{"id":175495,"date":"2024-11-08T06:21:17","date_gmt":"2024-11-07T22:21:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175495\/"},"modified":"2024-11-08T06:21:18","modified_gmt":"2024-11-07T22:21:18","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%9b%b4%e6%96%b0%e6%96%b9%e6%b3%95%e4%be%86%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175495\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u7684\u66f4\u65b0\u65b9\u6cd5\u4f86\u66f4\u65b0\u6578\u64da\uff1f (\u6578\u64da\u5eab\u7684\u6578\u64da\u5f97\u8abf\u7528\u66f4\u65b0\u65b9\u6cd5)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%9b%b4%e6%96%b0%e6%96%b9%e6%b3%95%e4%be%86%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%ef%bc%9f-NsSVjBIEKT\">\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u7684\u66f4\u65b0\u65b9\u6cd5\u4f86\u66f4\u65b0\u6578\u64da\uff1f<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6578\u64da\u5eab\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002\u7121\u8ad6\u662f\u7528\u65bc\u5b58\u5132\u7528\u6236\u4fe1\u606f\u3001\u4ea4\u6613\u8a18\u9304\u9084\u662f\u5176\u4ed6\u985e\u578b\u7684\u6578\u64da\uff0c\u6578\u64da\u5eab\u7684\u6709\u6548\u7ba1\u7406\u90fd\u662f\u78ba\u4fdd\u61c9\u7528\u7a0b\u5e8f\u6b63\u5e38\u904b\u884c\u7684\u95dc\u9375\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u7684\u66f4\u65b0\u65b9\u6cd5\u4f86\u66f4\u65b0\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\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-NsSVjBIEKT\">\u6578\u64da\u5eab\u66f4\u65b0\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u66f4\u65b0\u662f\u6307\u5c0d\u5df2\u5b58\u5728\u7684\u6578\u64da\u9032\u884c\u4fee\u6539\u7684\u904e\u7a0b\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528 SQL \u8a9e\u8a00\u4e2d\u7684 UPDATE \u8a9e\u53e5\u3002\u66f4\u65b0\u64cd\u4f5c\u53ef\u4ee5\u91dd\u5c0d\u55ae\u500b\u8a18\u9304\u6216\u591a\u500b\u8a18\u9304\u9032\u884c\uff0c\u5177\u9ad4\u53d6\u6c7a\u65bc\u689d\u4ef6\u7684\u8a2d\u7f6e\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-NsSVjBIEKT\">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<strong>\u8868\u540d<\/strong>\u662f\u8981\u66f4\u65b0\u7684\u6578\u64da\u8868\uff0c<strong>\u52171<\/strong>\u3001<strong>\u52172<\/strong>\u662f\u9700\u8981\u66f4\u65b0\u7684\u5217\uff0c\u800c<strong>\u689d\u4ef6<\/strong>\u5247\u7528\u65bc\u6307\u5b9a\u54ea\u4e9b\u8a18\u9304\u9700\u8981\u88ab\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-update-%e8%aa%9e%e5%8f%a5%e7%9a%84%e7%a4%ba%e4%be%8b-NsSVjBIEKT\">\u4f7f\u7528 UPDATE \u8a9e\u53e5\u7684\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 UPDATE \u8a9e\u53e5\u4f86\u66f4\u65b0\u6578\u64da\uff1a<\/p>\n<pre><code>UPDATE users\nSET email = 'newemail@example.com'\nWHERE user_id = 1;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07\u7528\u6236 ID \u70ba 1 \u7684\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u66f4\u65b0\u70ba &#8216;newemail@example.com&#8217;\u3002<\/p>\n<h3 id=\"%e6%9b%b4%e6%96%b0%e5%a4%9a%e5%80%8b%e5%88%97-NsSVjBIEKT\">\u66f4\u65b0\u591a\u500b\u5217<\/h3>\n<p>\u5982\u679c\u9700\u8981\u540c\u6642\u66f4\u65b0\u591a\u500b\u5217\uff0c\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n<pre><code>UPDATE users\nSET email = 'newemail@example.com', name = '\u65b0\u540d\u5b57'\nWHERE user_id = 1;<\/code><\/pre>\n<p>\u9019\u5c07\u540c\u6642\u66f4\u65b0\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u548c\u540d\u5b57\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e9%80%b2%e8%a1%8c%e6%9b%b4%e6%96%b0-NsSVjBIEKT\">\u4f7f\u7528\u689d\u4ef6\u9032\u884c\u66f4\u65b0<\/h2>\n<p>\u5728\u9032\u884c\u66f4\u65b0\u6642\uff0c\u4f7f\u7528 WHERE \u5b50\u53e5\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u56e0\u70ba\u5b83\u53ef\u4ee5\u9632\u6b62\u610f\u5916\u66f4\u65b0\u6240\u6709\u8a18\u9304\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4e0d\u52a0 WHERE \u5b50\u53e5\uff0c\u5247\u6574\u500b\u8868\u7684\u6240\u6709\u8a18\u9304\u90fd\u6703\u88ab\u66f4\u65b0\uff1a<\/p>\n<pre><code>UPDATE users\nSET email = 'default@example.com';<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u64cd\u4f5c\u6703\u5c07\u6240\u6709\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u90fd\u6539\u70ba &#8216;default@example.com&#8217;\uff0c\u9019\u901a\u5e38\u4e0d\u662f\u6211\u5011\u60f3\u8981\u7684\u7d50\u679c\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e5%ad%90%e6%9f%a5%e8%a9%a2%e9%80%b2%e8%a1%8c%e6%9b%b4%e6%96%b0-NsSVjBIEKT\">\u4f7f\u7528\u5b50\u67e5\u8a62\u9032\u884c\u66f4\u65b0<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u6839\u64da\u5176\u4ed6\u8868\u4e2d\u7684\u6578\u64da\u4f86\u66f4\u65b0\u6578\u64da\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528\u5b50\u67e5\u8a62\uff1a<\/p>\n<pre><code>UPDATE users\nSET email = (SELECT email FROM temp_users WHERE user_id = users.user_id)\nWHERE EXISTS (SELECT 1 FROM temp_users WHERE user_id = users.user_id);<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u6839\u64da <strong>temp_users<\/strong> \u8868\u4e2d\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u4f86\u66f4\u65b0 <strong>users<\/strong> \u8868\u4e2d\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-NsSVjBIEKT\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u9032\u884c\u66f4\u65b0\u64cd\u4f5c\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<li>\u5728\u57f7\u884c UPDATE \u8a9e\u53e5\u6642\uff0c\u52d9\u5fc5\u78ba\u8a8d WHERE \u689d\u4ef6\u7684\u6b63\u78ba\u6027\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u640d\u58de\u3002<\/li>\n<li>\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u8868\u7684\u66f4\u65b0\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NsSVjBIEKT\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u7684\u66f4\u65b0\u65b9\u6cd5\u662f\u7ba1\u7406\u548c\u7dad\u8b77\u6578\u64da\u7684\u57fa\u672c\u6280\u80fd\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528 UPDATE \u8a9e\u53e5\u548c\u689d\u4ef6\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u66f4\u65b0\u6578\u64da\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u3002\u7121\u8ad6\u662f\u5728\u958b\u767c\u65b0\u61c9\u7528\u7a0b\u5e8f\u9084\u662f\u7dad\u8b77\u73fe\u6709\u7cfb\u7d71\u6642\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u8853\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u7684\u66f4\u65b0\u65b9\u6cd5\u6709\u6548\u66f4\u65b0\u6578\u64da\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\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-175495","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175495","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=175495"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175495\/revisions"}],"predecessor-version":[{"id":175496,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175495\/revisions\/175496"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}