{"id":187312,"date":"2024-11-11T13:13:19","date_gmt":"2024-11-11T05:13:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187312\/"},"modified":"2024-11-11T13:13:20","modified_gmt":"2024-11-11T05:13:20","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a2%9d%e4%bb%b6%e5%88%a4%e6%96%b7%e8%aa%9e%e5%8f%a5%e7%b0%a1%e4%bb%8b-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a2%9d%e4%bb%b6%e5%88%a4%e6%96%b7%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187312\/","title":{"rendered":"\u6578\u64da\u5eab\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u7c21\u4ecb (\u6578\u64da\u5eab\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a2%9d%e4%bb%b6%e5%88%a4%e6%96%b7%e8%aa%9e%e5%8f%a5%e7%b0%a1%e4%bb%8b-aTBATOUKgR\">\u6578\u64da\u5eab\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u7c21\u4ecb<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u662f\u7528\u4f86\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u4f86\u7be9\u9078\u3001\u66f4\u65b0\u6216\u522a\u9664\u6578\u64da\u7684\u91cd\u8981\u5de5\u5177\u3002\u9019\u4e9b\u8a9e\u53e5\u901a\u5e38\u7528\u65bc SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u4e2d\uff0c\u5e6b\u52a9\u7528\u6236\u9032\u884c\u6578\u64da\u64cd\u4f5c\u548c\u67e5\u8a62\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u6578\u64da\u5eab\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u7684\u57fa\u672c\u6982\u5ff5\u3001\u5e38\u898b\u985e\u578b\u53ca\u5176\u4f7f\u7528\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%a2%9d%e4%bb%b6%e5%88%a4%e6%96%b7%e8%aa%9e%e5%8f%a5%ef%bc%9f-aTBATOUKgR\">\u4ec0\u9ebc\u662f\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\uff1f<\/h2>\n<p>\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u662f\u6307\u5728\u57f7\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u4f86\u6c7a\u5b9a\u64cd\u4f5c\u7684\u57f7\u884c\u7d50\u679c\u3002\u9019\u4e9b\u8a9e\u53e5\u901a\u5e38\u7528\u65bc\u67e5\u8a62\u6578\u64da\u3001\u66f4\u65b0\u6578\u64da\u6216\u522a\u9664\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\uff0c\u7528\u6236\u53ef\u4ee5\u7cbe\u78ba\u5730\u63a7\u5236\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e7%9a%84%e6%a2%9d%e4%bb%b6%e5%88%a4%e6%96%b7%e8%aa%9e%e5%8f%a5-aTBATOUKgR\">\u5e38\u898b\u7684\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u6700\u5e38\u898b\u7684\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>SELECT \u8a9e\u53e5<\/strong>\uff1a\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u67e5\u8a62\u6578\u64da\u3002<\/li>\n<li><strong>UPDATE \u8a9e\u53e5<\/strong>\uff1a\u7528\u65bc\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u73fe\u6709\u6578\u64da\u3002<\/li>\n<li><strong>DELETE \u8a9e\u53e5<\/strong>\uff1a\u7528\u65bc\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002<\/li>\n<\/ul>\n<h3 id=\"1-select-%e8%aa%9e%e5%8f%a5-aTBATOUKgR\">1. SELECT \u8a9e\u53e5<\/h3>\n<p>SELECT \u8a9e\u53e5\u662f\u7528\u65bc\u67e5\u8a62\u6578\u64da\u7684\u57fa\u672c\u8a9e\u53e5\u3002\u5b83\u53ef\u4ee5\u8207 WHERE \u5b50\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u7be9\u9078\u6578\u64da\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 18;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u8a9e\u53e5\u5c07\u67e5\u8a62\u6240\u6709\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\u3002<\/p>\n<h3 id=\"2-update-%e8%aa%9e%e5%8f%a5-aTBATOUKgR\">2. UPDATE \u8a9e\u53e5<\/h3>\n<p>UPDATE \u8a9e\u53e5\u7528\u65bc\u66f4\u65b0\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u5b83\u540c\u6a23\u53ef\u4ee5\u8207 WHERE \u5b50\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u78ba\u4fdd\u53ea\u66f4\u65b0\u7b26\u5408\u689d\u4ef6\u7684\u6578\u64da\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>UPDATE users SET status = 'active' WHERE last_login &gt; '2023-01-01';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u628a\u6240\u6709\u5728 2023 \u5e74 1 \u6708 1 \u65e5\u4e4b\u5f8c\u767b\u9304\u7684\u7528\u6236\u7684\u72c0\u614b\u66f4\u65b0\u70ba &#8216;active&#8217;\u3002<\/p>\n<h3 id=\"3-delete-%e8%aa%9e%e5%8f%a5-aTBATOUKgR\">3. DELETE \u8a9e\u53e5<\/h3>\n<p>DELETE \u8a9e\u53e5\u7528\u65bc\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u4f7f\u7528\u6642\u4e5f\u53ef\u4ee5\u52a0\u4e0a WHERE \u5b50\u53e5\uff0c\u4ee5\u907f\u514d\u522a\u9664\u6240\u6709\u6578\u64da\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE status = 'inactive';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u522a\u9664\u6240\u6709\u72c0\u614b\u70ba &#8216;inactive&#8217; \u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e6%a2%9d%e4%bb%b6%e5%88%a4%e6%96%b7%e7%9a%84%e9%81%8b%e7%ae%97%e7%ac%a6-aTBATOUKgR\">\u689d\u4ef6\u5224\u65b7\u7684\u904b\u7b97\u7b26<\/h2>\n<p>\u5728\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u4e2d\uff0c\u5e38\u7528\u7684\u904b\u7b97\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>=<\/strong>\uff1a\u7b49\u65bc<\/li>\n<li><strong>&gt;<\/strong>\uff1a\u5927\u65bc<\/li>\n<li><strong>&lt;<\/strong>\uff1a\u5c0f\u65bc<\/li>\n<li><strong>&gt;=<\/strong>\uff1a\u5927\u65bc\u6216\u7b49\u65bc<\/li>\n<li><strong>&lt;=<\/strong>\uff1a\u5c0f\u65bc\u6216\u7b49\u65bc<\/li>\n<li><strong>!=<\/strong>\uff1a\u4e0d\u7b49\u65bc<\/li>\n<li><strong>AND<\/strong>\uff1a\u908f\u8f2f\u8207<\/li>\n<li><strong>OR<\/strong>\uff1a\u908f\u8f2f\u6216<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u904b\u7b97\u7b26\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u69cb\u5efa\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u689d\u4ef6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 18 AND status = 'active';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u67e5\u8a62\u6240\u6709\u5e74\u9f61\u5927\u65bc 18 \u6b72\u4e14\u72c0\u614b\u70ba &#8216;active&#8217; \u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-aTBATOUKgR\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u662f\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u7cbe\u78ba\u5730\u7be9\u9078\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u901a\u904e\u719f\u6089\u9019\u4e9b\u8a9e\u53e5\u53ca\u5176\u904b\u7b97\u7b26\uff0c\u7528\u6236\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\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\u82e5\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216\u5176\u4ed6\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u689d\u4ef6\u5224\u65b7\u8a9e\u53e5\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u5176\u5728\u67e5\u8a62\u4e2d\u7684\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u64cd\u4f5c\u7684\u6548\u7387\u8207\u6e96\u78ba\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-187312","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187312","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=187312"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187312\/revisions"}],"predecessor-version":[{"id":187313,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187312\/revisions\/187313"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187312"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}