{"id":165977,"date":"2024-11-05T14:41:20","date_gmt":"2024-11-05T06:41:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/165977\/"},"modified":"2024-11-05T14:41:20","modified_gmt":"2024-11-05T06:41:20","slug":"%e5%bf%ab%e9%80%9f%e6%9b%b4%e6%96%b0sql2023%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%98%e9%8c%84-sql2023%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9b%b4%e6%96%b0%e4%b8%80%e6%a2%9d%e4%bf%a1%e6%81%af","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/165977\/","title":{"rendered":"\u5feb\u901f\u66f4\u65b0SQL2023\u6578\u64da\u5eab\u8a18\u9304 (sql2023\u6578\u64da\u5eab\u66f4\u65b0\u4e00\u689d\u4fe1\u606f)"},"content":{"rendered":"<h1 id=\"%e5%bf%ab%e9%80%9f%e6%9b%b4%e6%96%b0sql2023%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%98%e9%8c%84-sql2023%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9b%b4%e6%96%b0%e4%b8%80%e6%a2%9d%e4%bf%a1%e6%81%af-ulaIdSzbgd\">\u5feb\u901f\u66f4\u65b0SQL2023\u6578\u64da\u5eab\u8a18\u9304 (sql2023\u6578\u64da\u5eab\u66f4\u65b0\u4e00\u689d\u4fe1\u606f)<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u66f4\u65b0\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5feb\u901f\u66f4\u65b0SQL2023\u6578\u64da\u5eab\u4e2d\u7684\u8a18\u9304\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"sql2023%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a6%82%e8%bf%b0-ulaIdSzbgd\">SQL2023\u6578\u64da\u5eab\u6982\u8ff0<\/h2>\n<p>SQL2023\u662f\u4e00\u500b\u5047\u8a2d\u7684\u6578\u64da\u5eab\u7248\u672c\uff0c\u4ee3\u8868\u4e86\u6700\u65b0\u7684\u6578\u64da\u5eab\u6280\u8853\u548c\u529f\u80fd\u3002\u96a8\u8457\u6578\u64da\u5eab\u6280\u8853\u7684\u9032\u6b65\uff0cSQL2023\u53ef\u80fd\u6703\u5f15\u5165\u65b0\u7684\u8a9e\u6cd5\u548c\u529f\u80fd\uff0c\u4ee5\u63d0\u9ad8\u6578\u64da\u64cd\u4f5c\u7684\u6548\u7387\u548c\u9748\u6d3b\u6027\u3002\u7121\u8ad6\u662f\u66f4\u65b0\u55ae\u689d\u8a18\u9304\u9084\u662f\u6279\u91cf\u66f4\u65b0\uff0c\u4e86\u89e3\u57fa\u672c\u7684SQL\u8a9e\u6cd5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"%e6%9b%b4%e6%96%b0%e5%96%ae%e6%a2%9d%e8%a8%98%e9%8c%84%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-ulaIdSzbgd\">\u66f4\u65b0\u55ae\u689d\u8a18\u9304\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u66f4\u65b0\u8a18\u9304\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>UPDATE \u8868\u540d\nSET \u5217\u540d1 = \u503c1, \u5217\u540d2 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u9019\u6bb5\u8a9e\u6cd5\u7684\u542b\u7fa9\u662f\uff1a\u5728\u6307\u5b9a\u7684\u8868\u4e2d\uff0c\u6839\u64da\u689d\u4ef6\u66f4\u65b0\u7279\u5b9a\u7684\u5217\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u5177\u9ad4\u7684\u793a\u4f8b\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\u6236ID\u70ba1\u7684\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u66f4\u65b0\u70ba\u201cnewemail@example.com\u201d\u3002<\/p>\n<h2 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%e5%ae%8c%e6%95%b4%e6%80%a7-ulaIdSzbgd\">\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u66f4\u65b0\u6642\uff0c\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\uff0c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u4e8b\u52d9\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN;\n\nUPDATE users\nSET email = 'newemail@example.com'\nWHERE user_id = 1;\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\u57f7\u884c\u66f4\u65b0\u64cd\u4f5c\uff0c\u6700\u5f8c\u63d0\u4ea4\u4e8b\u52d9\u3002\u5982\u679c\u5728\u66f4\u65b0\u904e\u7a0b\u4e2d\u51fa\u73fe\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528ROLLBACK\u4f86\u64a4\u92b7\u6240\u6709\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e6%89%b9%e9%87%8f%e6%9b%b4%e6%96%b0%e7%9a%84%e6%8a%80%e5%b7%a7-ulaIdSzbgd\">\u6279\u91cf\u66f4\u65b0\u7684\u6280\u5de7<\/h2>\n<p>\u5982\u679c\u9700\u8981\u66f4\u65b0\u591a\u689d\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528\u6279\u91cf\u66f4\u65b0\u7684\u65b9\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>UPDATE users\nSET status = 'active'\nWHERE last_login &gt; '2023-01-01';<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u6240\u6709\u57282023\u5e741\u67081\u65e5\u4e4b\u5f8c\u767b\u9304\u7684\u7528\u6236\u7684\u72c0\u614b\u66f4\u65b0\u70ba\u201cactive\u201d\u3002\u9019\u6a23\u53ef\u4ee5\u4e00\u6b21\u6027\u66f4\u65b0\u591a\u689d\u8a18\u9304\uff0c\u5f9e\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e6%9b%b4%e6%96%b0-ulaIdSzbgd\">\u4f7f\u7528\u689d\u4ef6\u66f4\u65b0<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u6839\u64da\u4e0d\u540c\u7684\u689d\u4ef6\u4f86\u66f4\u65b0\u8a18\u9304\u3002\u53ef\u4ee5\u4f7f\u7528CASE\u8a9e\u53e5\u4f86\u5be6\u73fe\u9019\u4e00\u9ede\uff1a<\/p>\n<pre><code>UPDATE users\nSET status = CASE\n    WHEN last_login &gt; '2023-01-01' THEN 'active'\n    ELSE 'inactive'\nEND;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u6839\u64da\u7528\u6236\u7684\u6700\u5f8c\u767b\u9304\u6642\u9593\u4f86\u66f4\u65b0\u72c0\u614b\uff0c\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u9748\u6d3b\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ulaIdSzbgd\">\u7e3d\u7d50<\/h2>\n<p>\u5feb\u901f\u66f4\u65b0SQL2023\u6578\u64da\u5eab\u8a18\u9304\u662f\u4e00\u9805\u57fa\u672c\u4f46\u91cd\u8981\u7684\u6280\u80fd\u3002\u901a\u904e\u638c\u63e1\u57fa\u672c\u7684SQL\u8a9e\u6cd5\u3001\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u3001\u4ee5\u53ca\u5229\u7528\u6279\u91cf\u66f4\u65b0\u548c\u689d\u4ef6\u66f4\u65b0\u7684\u6280\u5de7\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4e0a\u904b\u884c\u548c\u7ba1\u7406\u6578\u64da\u5eab\uff0c\u53ef\u4ee5\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u61c9\u5c0d\u696d\u52d9\u6311\u6230\uff0c\u63d0\u5347\u6574\u9ad4\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5feb\u901f\u66f4\u65b0SQL2023\u6578\u64da\u5eab\u8a18\u9304\uff0c\u8f15\u9b06\u4fee\u6539\u4e00\u689d\u4fe1\u606f\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u5373\u6642\u6e96\u78ba\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-165977","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165977","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=165977"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165977\/revisions"}],"predecessor-version":[{"id":165978,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/165977\/revisions\/165978"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=165977"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=165977"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=165977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}