{"id":187800,"date":"2024-11-11T17:17:20","date_gmt":"2024-11-11T09:17:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187800\/"},"modified":"2024-11-11T17:17:21","modified_gmt":"2024-11-11T09:17:21","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%b1%82%e5%85%a9%e5%ad%97%e6%ae%b5%e7%9a%84%e4%b9%98%e7%a9%8d%ef%bc%9a%e5%af%a6%e7%8f%be%e7%b0%a1%e5%96%ae%e5%bf%ab%e6%8d%b7-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187800\/","title":{"rendered":"\u6578\u64da\u5eab\u4e2d\u6c42\u5169\u5b57\u6bb5\u7684\u4e58\u7a4d\uff1a\u5be6\u73fe\u7c21\u55ae\u5feb\u6377 (\u6578\u64da\u5eab\u4e2d\u6c42\u5169\u5b57\u6bb5\u7684\u4e58\u7a4d)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%b1%82%e5%85%a9%e5%ad%97%e6%ae%b5%e7%9a%84%e4%b9%98%e7%a9%8d%ef%bc%9a%e5%af%a6%e7%8f%be%e7%b0%a1%e5%96%ae%e5%bf%ab%e6%8d%b7-iSkvkSoqVT\">\u6578\u64da\u5eab\u4e2d\u6c42\u5169\u5b57\u6bb5\u7684\u4e58\u7a4d\uff1a\u5be6\u73fe\u7c21\u55ae\u5feb\u6377<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u6578\u64da\u9032\u884c\u5404\u7a2e\u8a08\u7b97\u548c\u64cd\u4f5c\u3002\u5176\u4e2d\uff0c\u8a08\u7b97\u5169\u500b\u5b57\u6bb5\u7684\u4e58\u7a4d\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5728\u5546\u696d\u5831\u544a\u4e2d\uff0c\u9084\u662f\u5728\u6578\u64da\u5206\u6790\u4e2d\uff0c\u80fd\u5920\u5feb\u901f\u800c\u6e96\u78ba\u5730\u7372\u5f97\u9019\u4e9b\u8a08\u7b97\u7d50\u679c\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u5169\u5b57\u6bb5\u7684\u4e58\u7a4d\u8a08\u7b97\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-iSkvkSoqVT\">\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u5b57\u6bb5\u662f\u8868\u683c\u4e2d\u7684\u4e00\u5217\uff0c\u6bcf\u4e00\u5217\u90fd\u5305\u542b\u7279\u5b9a\u985e\u578b\u7684\u6578\u64da\u3002\u7576\u6211\u5011\u63d0\u5230\u5169\u500b\u5b57\u6bb5\u7684\u4e58\u7a4d\u6642\uff0c\u901a\u5e38\u662f\u6307\u5c07\u9019\u5169\u500b\u5b57\u6bb5\u4e2d\u7684\u6578\u503c\u76f8\u4e58\uff0c\u4e26\u8fd4\u56de\u7d50\u679c\u3002\u9019\u4e00\u64cd\u4f5c\u53ef\u4ee5\u901a\u904e SQL \u67e5\u8a62\u8a9e\u53e5\u8f15\u9b06\u5be6\u73fe\u3002<\/p>\n<h2 id=\"sql-%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5%e7%a4%ba%e4%be%8b-iSkvkSoqVT\">SQL \u67e5\u8a62\u8a9e\u53e5\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 SQL \u67e5\u8a62\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u8a08\u7b97\u5169\u500b\u5b57\u6bb5\u7684\u4e58\u7a4d\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>orders<\/code> \u7684\u8868\u683c\uff0c\u5176\u4e2d\u5305\u542b <code>quantity<\/code>\uff08\u6578\u91cf\uff09\u548c <code>price<\/code>\uff08\u50f9\u683c\uff09\u5169\u500b\u5b57\u6bb5\uff0c\u6211\u5011\u5e0c\u671b\u8a08\u7b97\u6bcf\u500b\u8a02\u55ae\u7684\u7e3d\u91d1\u984d\u3002<\/p>\n<pre><code>SELECT quantity, price, (quantity * price) AS total_amount\nFROM orders;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u9078\u64c7\u4e86 <code>quantity<\/code> \u548c <code>price<\/code> \u5169\u500b\u5b57\u6bb5\uff0c\u4e26\u4f7f\u7528\u62ec\u865f\u5c07\u5b83\u5011\u76f8\u4e58\uff0c\u7d50\u679c\u547d\u540d\u70ba <code>total_amount<\/code>\u3002\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u770b\u5230\u6bcf\u500b\u8a02\u55ae\u7684\u7e3d\u91d1\u984d\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8-iSkvkSoqVT\">\u4f7f\u7528\u805a\u5408\u51fd\u6578<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u5c0d\u6240\u6709\u8a02\u55ae\u7684\u7e3d\u91d1\u984d\u9032\u884c\u6c42\u548c\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528 SQL \u7684\u805a\u5408\u51fd\u6578 <code>SUM()<\/code>\u3002\u4ee5\u4e0b\u662f\u76f8\u61c9\u7684\u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT SUM(quantity * price) AS total_revenue\nFROM orders;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u8a02\u55ae\u7684\u7e3d\u6536\u5165\uff0c\u901a\u904e\u5c07\u6bcf\u500b\u8a02\u55ae\u7684 <code>quantity<\/code> \u548c <code>price<\/code> \u76f8\u4e58\u5f8c\u518d\u9032\u884c\u6c42\u548c\u3002<\/p>\n<h2 id=\"%e8%80%83%e6%85%ae%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-iSkvkSoqVT\">\u8003\u616e\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728\u9032\u884c\u4e58\u7a4d\u8a08\u7b97\u6642\uff0c\u6578\u64da\u985e\u578b\u662f\u9700\u8981\u7279\u5225\u6ce8\u610f\u7684\u554f\u984c\u3002\u78ba\u4fdd\u53c3\u8207\u8a08\u7b97\u7684\u5b57\u6bb5\u90fd\u662f\u6578\u503c\u985e\u578b\uff08\u5982\u6574\u6578\u6216\u6d6e\u9ede\u6578\uff09\uff0c\u5426\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u6216\u4e0d\u6b63\u78ba\u7684\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u5982\u679c <code>quantity<\/code> \u662f\u5b57\u7b26\u4e32\u985e\u578b\uff0c\u5247\u5728\u8a08\u7b97\u6642\u6703\u51fa\u73fe\u554f\u984c\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-iSkvkSoqVT\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u96c6\u6642\uff0c\u8a08\u7b97\u5169\u500b\u5b57\u6bb5\u7684\u4e58\u7a4d\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002\u70ba\u4e86\u63d0\u9ad8\u6548\u7387\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u5eab\u8868\u683c\u5df2\u7d93\u904e\u512a\u5316\uff0c\u4e26\u4e14\u7d22\u5f15\u8a2d\u7f6e\u5408\u7406\u3002<\/li>\n<li>\u5728\u9700\u8981\u9032\u884c\u5927\u91cf\u8a08\u7b97\u7684\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u8996\u5716\uff08View\uff09\u4f86\u9810\u5148\u8a08\u7b97\u7d50\u679c\u3002<\/li>\n<li>\u5b9a\u671f\u6e05\u7406\u548c\u7dad\u8b77\u6578\u64da\u5eab\uff0c\u4ee5\u4fdd\u6301\u5176\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-iSkvkSoqVT\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\u8a08\u7b97\u5169\u500b\u5b57\u6bb5\u7684\u4e58\u7a4d\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u64cd\u4f5c\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u7372\u5f97\u6240\u9700\u7684\u6578\u64da\u5206\u6790\u7d50\u679c\u3002\u901a\u904e\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002\u7121\u8ad6\u662f\u55ae\u500b\u8a08\u7b97\u9084\u662f\u805a\u5408\u8a08\u7b97\uff0c\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u6280\u5de7\u90fd\u80fd\u63d0\u9ad8\u6211\u5011\u5728\u6578\u64da\u8655\u7406\u4e2d\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u6211\u5011\u63d0\u4f9b\u5404\u7a2e <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u904b\u884c\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5feb\u901f\u8a08\u7b97\u5169\u500b\u5b57\u6bb5\u7684\u4e58\u7a4d\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u8655\u7406\u548c\u5206\u6790\uff0c\u63d0\u5347\u5de5\u4f5c\u6548\u7387\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-187800","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187800","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=187800"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187800\/revisions"}],"predecessor-version":[{"id":187801,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187800\/revisions\/187801"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}