{"id":196402,"date":"2024-11-13T23:17:19","date_gmt":"2024-11-13T15:17:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196402\/"},"modified":"2024-11-13T23:17:20","modified_gmt":"2024-11-13T15:17:20","slug":"%e5%9f%b7%e8%a1%8c%e4%b8%80%e6%a2%9d-sql-%e8%aa%9e%e5%8f%a5%ef%bc%8c%e6%9c%9f%e9%96%93%e7%99%bc%e7%94%9f%e4%ba%86%e4%bb%80%e9%ba%bc%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196402\/","title":{"rendered":"\u57f7\u884c\u4e00\u689d SQL \u8a9e\u53e5\uff0c\u671f\u9593\u767c\u751f\u4e86\u4ec0\u9ebc\uff1f"},"content":{"rendered":"<h1 id=\"%e5%9f%b7%e8%a1%8c%e4%b8%80%e6%a2%9d-sql-%e8%aa%9e%e5%8f%a5%ef%bc%8c%e6%9c%9f%e9%96%93%e7%99%bc%e7%94%9f%e4%ba%86%e4%bb%80%e9%ba%bc%ef%bc%9f-fcmNVrmahJ\">\u57f7\u884c\u4e00\u689d SQL \u8a9e\u53e5\uff0c\u671f\u9593\u767c\u751f\u4e86\u4ec0\u9ebc\uff1f<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u7684\u4e3b\u8981\u5de5\u5177\u3002\u7576\u6211\u5011\u57f7\u884c\u4e00\u689d SQL \u8a9e\u53e5\u6642\uff0c\u80cc\u5f8c\u767c\u751f\u4e86\u4e00\u7cfb\u5217\u8907\u96dc\u7684\u904e\u7a0b\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e9b\u904e\u7a0b\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3 SQL \u8a9e\u53e5\u7684\u57f7\u884c\u904e\u7a0b\u53ca\u5176\u80cc\u5f8c\u7684\u904b\u4f5c\u6a5f\u5236\u3002<\/p>\n<h2 id=\"sql-%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-fcmNVrmahJ\">SQL \u8a9e\u53e5\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>SQL \u8a9e\u53e5\u901a\u5e38\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>\u95dc\u9375\u5b57\uff1a<\/strong>\u5982 SELECT\u3001INSERT\u3001UPDATE\u3001DELETE \u7b49\u3002<\/li>\n<li><strong>\u8868\u540d\uff1a<\/strong>\u6307\u5b9a\u8981\u64cd\u4f5c\u7684\u6578\u64da\u8868\u3002<\/li>\n<li><strong>\u689d\u4ef6\uff1a<\/strong>\u7528\u65bc\u904e\u6ffe\u6578\u64da\u7684\u689d\u4ef6\uff0c\u5982 WHERE \u5b50\u53e5\u3002<\/li>\n<li><strong>\u6392\u5e8f\uff1a<\/strong>\u7528\u65bc\u6392\u5e8f\u7d50\u679c\u7684 ORDER BY \u5b50\u53e5\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4e00\u689d\u7c21\u55ae\u7684 SQL \u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 18 ORDER BY name;<\/code><\/pre>\n<h2 id=\"%e5%9f%b7%e8%a1%8c-sql-%e8%aa%9e%e5%8f%a5%e7%9a%84%e9%81%8e%e7%a8%8b-fcmNVrmahJ\">\u57f7\u884c SQL \u8a9e\u53e5\u7684\u904e\u7a0b<\/h2>\n<p>\u7576\u4e00\u689d SQL \u8a9e\u53e5\u88ab\u57f7\u884c\u6642\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u6703\u7d93\u6b77\u4ee5\u4e0b\u5e7e\u500b\u4e3b\u8981\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e8%aa%9e%e6%b3%95%e5%88%86%e6%9e%90-fcmNVrmahJ\">1. \u8a9e\u6cd5\u5206\u6790<\/h3>\n<p>\u9996\u5148\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u6703\u5c0d SQL \u8a9e\u53e5\u9032\u884c\u8a9e\u6cd5\u5206\u6790\u3002\u9019\u4e00\u6b65\u9a5f\u7684\u76ee\u7684\u662f\u6aa2\u67e5\u8a9e\u53e5\u7684\u8a9e\u6cd5\u662f\u5426\u6b63\u78ba\uff0c\u4e26\u5c07\u5176\u8f49\u63db\u70ba\u5167\u90e8\u8868\u793a\u5f62\u5f0f\u3002\u5982\u679c\u8a9e\u6cd5\u4e0d\u6b63\u78ba\uff0c\u7cfb\u7d71\u5c07\u8fd4\u56de\u932f\u8aa4\u4fe1\u606f\u3002<\/p>\n<h3 id=\"2-%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96-fcmNVrmahJ\">2. \u67e5\u8a62\u512a\u5316<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0cDBMS \u6703\u9032\u884c\u67e5\u8a62\u512a\u5316\u3002\u9019\u4e00\u904e\u7a0b\u6d89\u53ca\u8a55\u4f30\u4e0d\u540c\u7684\u57f7\u884c\u8a08\u5283\uff0c\u4ee5\u627e\u51fa\u6700\u6709\u6548\u7684\u65b9\u5f0f\u4f86\u57f7\u884c\u8a72\u67e5\u8a62\u3002\u512a\u5316\u5668\u6703\u8003\u616e\u591a\u7a2e\u56e0\u7d20\uff0c\u5305\u62ec\u6578\u64da\u8868\u7684\u5927\u5c0f\u3001\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1\u4ee5\u53ca\u6578\u64da\u7684\u5206\u4f48\u7b49\u3002<\/p>\n<h3 id=\"3-%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83%e7%94%9f%e6%88%90-fcmNVrmahJ\">3. \u57f7\u884c\u8a08\u5283\u751f\u6210<\/h3>\n<p>\u5728\u67e5\u8a62\u512a\u5316\u4e4b\u5f8c\uff0c\u7cfb\u7d71\u6703\u751f\u6210\u4e00\u500b\u57f7\u884c\u8a08\u5283\u3002\u9019\u500b\u8a08\u5283\u8a73\u7d30\u63cf\u8ff0\u4e86\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6240\u9700\u7684\u6578\u64da\uff0c\u5305\u62ec\u4f7f\u7528\u54ea\u4e9b\u7d22\u5f15\u3001\u5982\u4f55\u9023\u63a5\u8868\u7b49\u3002<\/p>\n<h3 id=\"4-%e5%9f%b7%e8%a1%8c%e6%9f%a5%e8%a9%a2-fcmNVrmahJ\">4. \u57f7\u884c\u67e5\u8a62<\/h3>\n<p>\u4e00\u65e6\u57f7\u884c\u8a08\u5283\u751f\u6210\uff0cDBMS \u5c31\u6703\u958b\u59cb\u57f7\u884c\u67e5\u8a62\u3002\u9019\u4e00\u904e\u7a0b\u5305\u62ec\u5f9e\u78c1\u789f\u4e2d\u8b80\u53d6\u6578\u64da\u3001\u57f7\u884c\u8a08\u7b97\u3001\u904e\u6ffe\u6578\u64da\u7b49\u3002\u6700\u7d42\uff0c\u7cfb\u7d71\u6703\u5c07\u7d50\u679c\u8fd4\u56de\u7d66\u7528\u6236\u3002<\/p>\n<h3 id=\"5-%e7%b5%90%e6%9e%9c%e8%bf%94%e5%9b%9e-fcmNVrmahJ\">5. \u7d50\u679c\u8fd4\u56de<\/h3>\n<p>\u6700\u5f8c\uff0c\u57f7\u884c\u7d50\u679c\u6703\u88ab\u8fd4\u56de\u7d66\u7528\u6236\u6216\u61c9\u7528\u7a0b\u5e8f\u3002\u9019\u4e9b\u7d50\u679c\u53ef\u4ee5\u662f\u67e5\u8a62\u7684\u6578\u64da\u96c6\uff0c\u4e5f\u53ef\u4ee5\u662f\u64cd\u4f5c\u6210\u529f\u6216\u5931\u6557\u7684\u72c0\u614b\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%9f%b7%e8%a1%8c%e4%b8%80%e6%a2%9d-sql-%e8%aa%9e%e5%8f%a5-fcmNVrmahJ\">\u793a\u4f8b\uff1a\u57f7\u884c\u4e00\u689d SQL \u8a9e\u53e5<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u5305\u542b\u54e1\u5de5\u7684\u57fa\u672c\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u689d\u67e5\u8a62\u6240\u6709\u5e74\u9f61\u5927\u65bc 30 \u6b72\u7684\u54e1\u5de5\u7684 SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE age &gt; 30;<\/code><\/pre>\n<p>\u5728\u57f7\u884c\u9019\u689d\u8a9e\u53e5\u6642\uff0c\u7cfb\u7d71\u5c07\u7d93\u6b77\u4e0a\u8ff0\u7684\u6240\u6709\u6b65\u9a5f\uff0c\u6700\u7d42\u8fd4\u56de\u7b26\u5408\u689d\u4ef6\u7684\u54e1\u5de5\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-fcmNVrmahJ\">\u7d50\u8ad6<\/h2>\n<p>\u57f7\u884c\u4e00\u689d SQL \u8a9e\u53e5\u7684\u904e\u7a0b\u6d89\u53ca\u591a\u500b\u6b65\u9a5f\uff0c\u5305\u62ec\u8a9e\u6cd5\u5206\u6790\u3001\u67e5\u8a62\u512a\u5316\u3001\u57f7\u884c\u8a08\u5283\u751f\u6210\u3001\u67e5\u8a62\u57f7\u884c\u548c\u7d50\u679c\u8fd4\u56de\u3002\u4e86\u89e3\u9019\u4e9b\u904e\u7a0b\u4e0d\u50c5\u6709\u52a9\u65bc\u958b\u767c\u8005\u64b0\u5beb\u66f4\u9ad8\u6548\u7684 SQL \u8a9e\u53e5\uff0c\u9084\u80fd\u5e6b\u52a9\u4ed6\u5011\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u5eab\u7684\u904b\u4f5c\u539f\u7406\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u9700\u8981\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u57f7\u884c SQL \u8a9e\u53e5\u7684\u904e\u7a0b\uff0c\u5305\u62ec\u89e3\u6790\u3001\u512a\u5316\u3001\u57f7\u884c\u53ca\u8fd4\u56de\u7d50\u679c\uff0c\u63ed\u793a\u80cc\u5f8c\u7684\u904b\u4f5c\u6a5f\u5236\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-196402","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196402","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=196402"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196402\/revisions"}],"predecessor-version":[{"id":196403,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196402\/revisions\/196403"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}