{"id":186510,"date":"2024-11-11T06:31:20","date_gmt":"2024-11-10T22:31:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186510\/"},"modified":"2024-11-11T06:31:21","modified_gmt":"2024-11-10T22:31:21","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%86%e9%a1%9e%e7%b5%b1%e8%a8%88%e6%95%b8%e9%87%8f%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8a%8a%e6%95%b8%e6%93%9a%e5%88%86%e9%a1%9e%e6%b1%82%e6%95%b8%e9%87%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186510\/","title":{"rendered":"\u6578\u64da\u5eab\u5206\u985e\u7d71\u8a08\u6578\u91cf\uff08\u6578\u64da\u5eab\u628a\u6578\u64da\u5206\u985e\u6c42\u6578\u91cf\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%86%e9%a1%9e%e7%b5%b1%e8%a8%88%e6%95%b8%e9%87%8f%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8a%8a%e6%95%b8%e6%93%9a%e5%88%86%e9%a1%9e%e6%b1%82%e6%95%b8%e9%87%8f%ef%bc%89-LAPjnragxW\">\u6578\u64da\u5eab\u5206\u985e\u7d71\u8a08\u6578\u91cf\uff08\u6578\u64da\u5eab\u628a\u6578\u64da\u5206\u985e\u6c42\u6578\u91cf\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u5206\u6790\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u6578\u64da\u5eab\u4e0d\u50c5\u50c5\u662f\u5b58\u5132\u6578\u64da\u7684\u5730\u65b9\uff0c\u66f4\u662f\u5206\u6790\u548c\u63d0\u53d6\u6709\u50f9\u503c\u4fe1\u606f\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u4e2d\u7684\u5206\u985e\u7d71\u8a08\u6578\u91cf\u7684\u6982\u5ff5\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\uff0c\u4ee5\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u4e3b\u984c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%86%e9%a1%9e%e7%b5%b1%e8%a8%88%e6%95%b8%e9%87%8f%ef%bc%9f-LAPjnragxW\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u5206\u985e\u7d71\u8a08\u6578\u91cf\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u5206\u985e\u7d71\u8a08\u6578\u91cf\u662f\u6307\u5c0d\u6578\u64da\u5eab\u4e2d\u67d0\u4e00\u7279\u5b9a\u5b57\u6bb5\u9032\u884c\u5206\u985e\uff0c\u4e26\u8a08\u7b97\u6bcf\u500b\u5206\u985e\u4e2d\u6578\u64da\u7684\u6578\u91cf\u3002\u9019\u4e00\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u8a00\u4e2d\u7684\u805a\u5408\u51fd\u6578\uff0c\u5982 COUNT()\uff0c\u4ee5\u53ca GROUP BY \u5b50\u53e5\u3002\u9019\u7a2e\u6280\u8853\u5728\u6578\u64da\u5206\u6790\u3001\u5831\u544a\u751f\u6210\u548c\u696d\u52d9\u6c7a\u7b56\u4e2d\u5177\u6709\u91cd\u8981\u610f\u7fa9\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%88%86%e9%a1%9e%e7%b5%b1%e8%a8%88%ef%bc%9f-LAPjnragxW\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5206\u985e\u7d71\u8a08\uff1f<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u5206\u6790\uff1a<\/strong>\u901a\u904e\u5c0d\u6578\u64da\u9032\u884c\u5206\u985e\u7d71\u8a08\uff0c\u53ef\u4ee5\u5feb\u901f\u4e86\u89e3\u6578\u64da\u7684\u5206\u4f48\u60c5\u6cc1\uff0c\u5f9e\u800c\u70ba\u5f8c\u7e8c\u7684\u5206\u6790\u63d0\u4f9b\u4f9d\u64da\u3002<\/li>\n<li><strong>\u696d\u52d9\u6c7a\u7b56\uff1a<\/strong>\u4f01\u696d\u53ef\u4ee5\u6839\u64da\u5206\u985e\u7d71\u8a08\u7684\u7d50\u679c\uff0c\u5236\u5b9a\u66f4\u5177\u91dd\u5c0d\u6027\u7684\u5e02\u5834\u7b56\u7565\u548c\u7522\u54c1\u958b\u767c\u8a08\u5283\u3002<\/li>\n<li><strong>\u5831\u544a\u751f\u6210\uff1a<\/strong>\u5728\u751f\u6210\u696d\u52d9\u5831\u544a\u6642\uff0c\u5206\u985e\u7d71\u8a08\u53ef\u4ee5\u5e6b\u52a9\u6e05\u6670\u5730\u5c55\u793a\u6578\u64da\uff0c\u8b93\u5831\u544a\u66f4\u5177\u8aaa\u670d\u529b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8c%e5%88%86%e9%a1%9e%e7%b5%b1%e8%a8%88%ef%bc%9f-LAPjnragxW\">\u5982\u4f55\u9032\u884c\u5206\u985e\u7d71\u8a08\uff1f<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684 SQL \u67e5\u8a62\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5c0d\u6578\u64da\u9032\u884c\u5206\u985e\u7d71\u8a08\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>sales<\/code> \u7684\u8868\uff0c\u8a72\u8868\u5305\u542b <code>product_id<\/code> \u548c <code>quantity<\/code> \u5169\u500b\u5b57\u6bb5\uff0c\u6211\u5011\u5e0c\u671b\u7d71\u8a08\u6bcf\u500b\u7522\u54c1\u7684\u92b7\u552e\u6578\u91cf\u3002<\/p>\n<pre><code>SELECT product_id, COUNT(quantity) AS total_sales\nFROM sales\nGROUP BY product_id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 <code>COUNT()<\/code> \u51fd\u6578\u4f86\u8a08\u7b97\u6bcf\u500b\u7522\u54c1\u7684\u92b7\u552e\u6578\u91cf\uff0c\u4e26\u4f7f\u7528 <code>GROUP BY<\/code> \u5b50\u53e5\u5c07\u7d50\u679c\u6309 <code>product_id<\/code> \u5206\u7d44\u3002\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u7372\u5f97\u6bcf\u500b\u7522\u54c1\u7684\u7e3d\u92b7\u552e\u6578\u91cf\u3002<\/p>\n<h2 id=\"%e9%80%b2%e9%9a%8e%e6%87%89%e7%94%a8-LAPjnragxW\">\u9032\u968e\u61c9\u7528<\/h2>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u5206\u985e\u7d71\u8a08\uff0c\u9084\u53ef\u4ee5\u9032\u884c\u66f4\u8907\u96dc\u7684\u5206\u6790\u3002\u4f8b\u5982\uff0c\u6211\u5011\u53ef\u4ee5\u6839\u64da\u6642\u9593\u7bc4\u570d\u9032\u884c\u5206\u985e\u7d71\u8a08\uff0c\u6216\u8005\u7d50\u5408\u5176\u4ed6\u5b57\u6bb5\u9032\u884c\u591a\u7dad\u5ea6\u5206\u6790\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u6309\u6708\u4efd\u7d71\u8a08\u6bcf\u500b\u7522\u54c1\u7684\u92b7\u552e\u6578\u91cf\u3002<\/p>\n<pre><code>SELECT product_id, \n       DATE_FORMAT(sale_date, '%Y-%m') AS sale_month, \n       COUNT(quantity) AS total_sales\nFROM sales\nGROUP BY product_id, sale_month\nORDER BY sale_month;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86 <code>DATE_FORMAT()<\/code> \u51fd\u6578\u5c07\u92b7\u552e\u65e5\u671f\u683c\u5f0f\u5316\u70ba\u5e74\u6708\uff0c\u4e26\u6839\u64da\u7522\u54c1\u548c\u6708\u4efd\u9032\u884c\u5206\u7d44\u3002\u9019\u6a23\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u4e86\u89e3\u6bcf\u500b\u7522\u54c1\u5728\u4e0d\u540c\u6708\u4efd\u7684\u92b7\u552e\u8da8\u52e2\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-LAPjnragxW\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u4e2d\u7684\u5206\u985e\u7d71\u8a08\u6578\u91cf\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u4f01\u696d\u548c\u500b\u4eba\u66f4\u597d\u5730\u7406\u89e3\u548c\u5229\u7528\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u8a00\u4e2d\u7684\u805a\u5408\u51fd\u6578\u548c\u5206\u7d44\u6280\u8853\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u7372\u5f97\u6709\u50f9\u503c\u7684\u898b\u89e3\uff0c\u5f9e\u800c\u652f\u6301\u696d\u52d9\u6c7a\u7b56\u548c\u6578\u64da\u5206\u6790\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u696d\u52d9\u4e2d\u6709\u6548\u5229\u7528\u6578\u64da\u5eab\u6709\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u7684\u4fe1\u606f\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u548c\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6578\u64da\u5eab\u5206\u985e\u7d71\u8a08\u6578\u91cf\u7684\u6280\u8853\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u5c07\u6578\u64da\u5206\u985e\u4e26\u8a08\u7b97\u5176\u6578\u91cf\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\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-186510","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186510","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=186510"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186510\/revisions"}],"predecessor-version":[{"id":186511,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186510\/revisions\/186511"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}