{"id":188462,"date":"2024-11-11T22:56:25","date_gmt":"2024-11-11T14:56:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188462\/"},"modified":"2024-11-11T22:56:26","modified_gmt":"2024-11-11T14:56:26","slug":"%e6%8e%a2%e7%a9%b6%e6%95%b8%e6%93%9a%e5%ba%ab%e9%96%8b%e7%99%bc%e5%b7%a5%e7%a8%8b%e5%b8%ab%e9%9d%a2%e8%a9%a6%ef%bc%9a%e6%87%89%e8%81%98%e8%80%85%e9%9c%80%e9%87%8d%e8%a6%96%e5%93%aa%e4%ba%9b%e9%97%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188462\/","title":{"rendered":"\u63a2\u7a76\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u9762\u8a66\uff1a\u61c9\u8058\u8005\u9700\u91cd\u8996\u54ea\u4e9b\u95dc\u9375\u6280\u80fd\uff1f (\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u9762\u8a66)"},"content":{"rendered":"<h1 id=\"%e6%8e%a2%e7%a9%b6%e6%95%b8%e6%93%9a%e5%ba%ab%e9%96%8b%e7%99%bc%e5%b7%a5%e7%a8%8b%e5%b8%ab%e9%9d%a2%e8%a9%a6%ef%bc%9a%e6%87%89%e8%81%98%e8%80%85%e9%9c%80%e9%87%8d%e8%a6%96%e5%93%aa%e4%ba%9b%e9%97%9c-QsmXaFogQX\">\u63a2\u7a76\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u9762\u8a66\uff1a\u61c9\u8058\u8005\u9700\u91cd\u8996\u54ea\u4e9b\u95dc\u9375\u6280\u80fd\uff1f<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u7684\u89d2\u8272\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u96a8\u8457\u4f01\u696d\u5c0d\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u9700\u6c42\u7684\u589e\u52a0\uff0c\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u7684\u9700\u6c42\u4e5f\u96a8\u4e4b\u4e0a\u5347\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u63a2\u8a0e\u5728\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u7684\u9762\u8a66\u4e2d\uff0c\u61c9\u8058\u8005\u9700\u8981\u91cd\u8996\u7684\u95dc\u9375\u6280\u80fd\u3002<\/p>\n<h2 id=\"1-%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e8%88%87%e5%bb%ba%e6%a8%a1-QsmXaFogQX\">1. \u6578\u64da\u5eab\u8a2d\u8a08\u8207\u5efa\u6a21<\/h2>\n<p>\u6578\u64da\u5eab\u8a2d\u8a08\u662f\u6578\u64da\u5eab\u958b\u767c\u7684\u57fa\u790e\u3002\u61c9\u8058\u8005\u9700\u8981\u719f\u6089\u6578\u64da\u5eab\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u5982\u5be6\u9ad4-\u95dc\u4fc2\u6a21\u578b\uff08ER\u6a21\u578b\uff09\u3001\u6b63\u898f\u5316\u548c\u53cd\u6b63\u898f\u5316\u7b49\u3002\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u8981\u6c42\u61c9\u8058\u8005\u8a2d\u8a08\u4e00\u500b\u7c21\u55ae\u7684\u6578\u64da\u5eab\u67b6\u69cb\uff0c\u4e26\u89e3\u91cb\u5176\u8a2d\u8a08\u601d\u8def\u3002<\/p>\n<pre><code>CREATE TABLE Users (\n    UserID INT PRIMARY KEY,\n    UserName VARCHAR(100),\n    Email VARCHAR(100),\n    CreatedAt DATETIME DEFAULT CURRENT_TIMESTAMP\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u61c9\u8058\u8005\u9700\u8981\u80fd\u5920\u89e3\u91cb\u70ba\u4ec0\u9ebc\u9078\u64c7\u9019\u4e9b\u5b57\u6bb5\uff0c\u4ee5\u53ca\u5982\u4f55\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"2-sql%e8%aa%9e%e8%a8%80%e7%9a%84%e7%86%9f%e7%b7%b4%e5%ba%a6-QsmXaFogQX\">2. SQL\u8a9e\u8a00\u7684\u719f\u7df4\u5ea6<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u6578\u64da\u5eab\u958b\u767c\u7684\u6838\u5fc3\u3002\u61c9\u8058\u8005\u61c9\u8a72\u80fd\u5920\u719f\u7df4\u4f7f\u7528SQL\u9032\u884c\u6578\u64da\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u3002\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u8981\u6c42\u61c9\u8058\u8005\u89e3\u6c7a\u4e00\u4e9b\u5be6\u969b\u7684SQL\u67e5\u8a62\u554f\u984c\u3002<\/p>\n<pre><code>SELECT UserName, COUNT(*) AS PostCount\nFROM Posts\nGROUP BY UserName\nHAVING PostCount &gt; 10;<\/code><\/pre>\n<p>\u9019\u6bb5SQL\u67e5\u8a62\u7684\u76ee\u7684\u662f\u627e\u51fa\u767c\u8868\u8d85\u904e10\u7bc7\u6587\u7ae0\u7684\u7528\u6236\uff0c\u61c9\u8058\u8005\u9700\u8981\u80fd\u5920\u89e3\u91cb\u67e5\u8a62\u7684\u908f\u8f2f\u548c\u7d50\u679c\u3002<\/p>\n<h2 id=\"3-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96-QsmXaFogQX\">3. \u6578\u64da\u5eab\u6027\u80fd\u512a\u5316<\/h2>\n<p>\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u512a\u5316\u8b8a\u5f97\u81f3\u95dc\u91cd\u8981\u3002\u61c9\u8058\u8005\u61c9\u8a72\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u7d22\u5f15\u3001\u67e5\u8a62\u512a\u5316\u548c\u6578\u64da\u5206\u5340\u7b49\u6280\u8853\u4f86\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u5728\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u8a62\u554f\u61c9\u8058\u8005\u5982\u4f55\u8655\u7406\u6027\u80fd\u74f6\u9838\u7684\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"4-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ae%89%e5%85%a8%e6%80%a7-QsmXaFogQX\">4. \u6578\u64da\u5eab\u5b89\u5168\u6027<\/h2>\n<p>\u6578\u64da\u5eab\u5b89\u5168\u6027\u662f\u4fdd\u8b77\u4f01\u696d\u6578\u64da\u7684\u91cd\u8981\u65b9\u9762\u3002\u61c9\u8058\u8005\u9700\u8981\u4e86\u89e3\u6578\u64da\u5eab\u7684\u5b89\u5168\u6027\u6700\u4f73\u5be6\u8e10\uff0c\u5305\u62ec\u7528\u6236\u6b0a\u9650\u7ba1\u7406\u3001\u6578\u64da\u52a0\u5bc6\u548c\u5099\u4efd\u7b56\u7565\u3002\u5728\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u8a62\u554f\u61c9\u8058\u8005\u5982\u4f55\u8a2d\u8a08\u4e00\u500b\u5b89\u5168\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u3002<\/p>\n<h2 id=\"5-%e7%86%9f%e6%82%89%e4%b8%8d%e5%90%8c%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e7%ae%a1%e7%90%86%e7%b3%bb%e7%b5%b1-QsmXaFogQX\">5. \u719f\u6089\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71<\/h2>\n<p>\u5e02\u5834\u4e0a\u6709\u591a\u7a2e\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\uff0c\u5982MySQL\u3001PostgreSQL\u3001Oracle\u548cMicrosoft SQL Server\u7b49\u3002\u61c9\u8058\u8005\u61c9\u8a72\u5c0d\u81f3\u5c11\u4e00\u7a2e\u4e3b\u6d41\u7684DBMS\u6709\u6df1\u5165\u7684\u4e86\u89e3\uff0c\u4e26\u80fd\u5920\u6839\u64da\u4e0d\u540c\u7684\u696d\u52d9\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u3002\u5728\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u8a62\u554f\u61c9\u8058\u8005\u5c0d\u4e0d\u540cDBMS\u7684\u512a\u7f3a\u9ede\u7684\u770b\u6cd5\u3002<\/p>\n<h2 id=\"6-%e7%89%88%e6%9c%ac%e6%8e%a7%e5%88%b6%e8%88%87%e5%9c%98%e9%9a%8a%e5%90%88%e4%bd%9c-QsmXaFogQX\">6. 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id=\"%e7%b8%bd%e7%b5%90-QsmXaFogQX\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u7684\u9762\u8a66\u4e0d\u50c5\u50c5\u662f\u6280\u8853\u80fd\u529b\u7684\u8003\u9a57\uff0c\u9084\u5305\u62ec\u61c9\u8058\u8005\u7684\u554f\u984c\u89e3\u6c7a\u80fd\u529b\u548c\u5718\u968a\u5408\u4f5c\u7cbe\u795e\u3002\u638c\u63e1\u6578\u64da\u5eab\u8a2d\u8a08\u3001SQL\u8a9e\u8a00\u3001\u6027\u80fd\u512a\u5316\u3001\u5b89\u5168\u6027\u3001\u4e0d\u540cDBMS\u7684\u77e5\u8b58\u4ee5\u53ca\u7248\u672c\u63a7\u5236\u7b49\u95dc\u9375\u6280\u80fd\uff0c\u5c07\u6709\u52a9\u65bc\u61c9\u8058\u8005\u5728\u9762\u8a66\u4e2d\u812b\u7a4e\u800c\u51fa\u3002\u5c0d\u65bc\u5e0c\u671b\u5728\u9999\u6e2f\u5c0b\u627e\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u670d\u52d9\u4e5f\u81f3\u95dc\u91cd\u8981\uff0c\u4ee5\u652f\u6301\u5176\u6578\u64da\u5eab\u7684\u9ad8\u6548\u904b\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u958b\u767c\u5de5\u7a0b\u5e2b\u9762\u8a66\u4e2d\u61c9\u8058\u8005\u9700\u91cd\u8996\u7684\u95dc\u9375\u6280\u80fd\uff0c\u5305\u62ecSQL\u3001\u6578\u64da\u5efa\u6a21\u548c\u6027\u80fd\u512a\u5316\u7b49\u8981\u7d20\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-188462","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188462","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=188462"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188462\/revisions"}],"predecessor-version":[{"id":188463,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188462\/revisions\/188463"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=188462"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=188462"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=188462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}