{"id":186128,"date":"2024-11-11T03:20:25","date_gmt":"2024-11-10T19:20:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186128\/"},"modified":"2024-11-11T03:20:26","modified_gmt":"2024-11-10T19:20:26","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%88%a5%e5%90%8d%ef%bc%9a%e5%a6%82%e4%bd%95%e5%8f%96%e5%90%8d%e6%89%8d%e8%83%bd%e8%ae%93%e4%bd%a0%e7%9a%84%e6%9f%a5%e8%a9%a2%e6%9b%b4%e6%9c%89%e6%95%88%e7%8e%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186128\/","title":{"rendered":"\u6578\u64da\u5eab\u8868\u5225\u540d\uff1a\u5982\u4f55\u53d6\u540d\u624d\u80fd\u8b93\u4f60\u7684\u67e5\u8a62\u66f4\u6709\u6548\u7387\uff1f\uff08\u6578\u64da\u5eab\u4e2d\u8868\u5225\u540d\u7684\u547d\u540d\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%88%a5%e5%90%8d%ef%bc%9a%e5%a6%82%e4%bd%95%e5%8f%96%e5%90%8d%e6%89%8d%e8%83%bd%e8%ae%93%e4%bd%a0%e7%9a%84%e6%9f%a5%e8%a9%a2%e6%9b%b4%e6%9c%89%e6%95%88%e7%8e%87-NZxOAYGabh\">\u6578\u64da\u5eab\u8868\u5225\u540d\uff1a\u5982\u4f55\u53d6\u540d\u624d\u80fd\u8b93\u4f60\u7684\u67e5\u8a62\u66f4\u6709\u6548\u7387\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u8868\u5225\u540d\uff08Alias\uff09\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\u3002\u5b83\u4e0d\u50c5\u80fd\u63d0\u9ad8\u67e5\u8a62\u7684\u53ef\u8b80\u6027\uff0c\u9084\u80fd\u5728\u8907\u96dc\u7684\u67e5\u8a62\u4e2d\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6e05\u6670\u5730\u7406\u89e3\u6578\u64da\u7684\u4f86\u6e90\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u70ba\u6578\u64da\u5eab\u4e2d\u7684\u8868\u53d6\u540d\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%a1%a8%e5%88%a5%e5%90%8d%ef%bc%9f-NZxOAYGabh\">\u4ec0\u9ebc\u662f\u8868\u5225\u540d\uff1f<\/h2>\n<p>\u8868\u5225\u540d\u662f\u6307\u5728SQL\u67e5\u8a62\u4e2d\u70ba\u8868\u6307\u5b9a\u7684\u4e00\u500b\u81e8\u6642\u540d\u7a31\u3002\u4f7f\u7528\u8868\u5225\u540d\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u8a9e\u53e5\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u8868\u7684\u806f\u63a5\u64cd\u4f5c\u6642\u3002\u8868\u5225\u540d\u901a\u5e38\u5728SELECT\u8a9e\u53e5\u4e2d\u4f7f\u7528\uff0c\u4e26\u4e14\u53ef\u4ee5\u4f7f\u67e5\u8a62\u66f4\u5177\u53ef\u8b80\u6027\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e4%bd%bf%e7%94%a8%e8%a1%a8%e5%88%a5%e5%90%8d%ef%bc%9f-NZxOAYGabh\">\u70ba\u4ec0\u9ebc\u9700\u8981\u4f7f\u7528\u8868\u5225\u540d\uff1f<\/h2>\n<ul>\n<li><strong>\u63d0\u9ad8\u53ef\u8b80\u6027\uff1a<\/strong>\u4f7f\u7528\u7c21\u77ed\u4e14\u6709\u610f\u7fa9\u7684\u5225\u540d\u53ef\u4ee5\u4f7f\u67e5\u8a62\u8a9e\u53e5\u66f4\u6613\u65bc\u7406\u89e3\u3002\u4f8b\u5982\uff0c\u5c07\u8868\u540d\u201ccustomer_orders\u201d\u7c21\u5316\u70ba\u201cco\u201d\uff0c\u53ef\u4ee5\u4f7f\u67e5\u8a62\u66f4\u7c21\u6f54\u3002<\/li>\n<li><strong>\u907f\u514d\u547d\u540d\u885d\u7a81\uff1a<\/strong>\u5728\u591a\u8868\u806f\u63a5\u6642\uff0c\u53ef\u80fd\u6703\u51fa\u73fe\u76f8\u540c\u7684\u5217\u540d\u3002\u4f7f\u7528\u8868\u5225\u540d\u53ef\u4ee5\u6e05\u695a\u5730\u6307\u5b9a\u6bcf\u500b\u5217\u7684\u4f86\u6e90\uff0c\u907f\u514d\u6df7\u6dc6\u3002<\/li>\n<li><strong>\u7c21\u5316\u67e5\u8a62\uff1a<\/strong>\u5728\u9577\u67e5\u8a62\u4e2d\uff0c\u4f7f\u7528\u8868\u5225\u540d\u53ef\u4ee5\u6e1b\u5c11\u8f38\u5165\u7684\u5b57\u7b26\u6578\uff0c\u5f9e\u800c\u63d0\u9ad8\u7de8\u5beb\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e7%82%ba%e8%a1%a8%e5%88%a5%e5%90%8d%e5%91%bd%e5%90%8d%ef%bc%9f-NZxOAYGabh\">\u5982\u4f55\u70ba\u8868\u5225\u540d\u547d\u540d\uff1f<\/h2>\n<p>\u70ba\u8868\u5225\u540d\u547d\u540d\u6642\uff0c\u61c9\u8003\u616e\u4ee5\u4e0b\u5e7e\u500b\u539f\u5247\uff1a<\/p>\n<h3 id=\"1-%e7%b0%a1%e6%bd%94%e6%98%8e%e7%9e%ad-NZxOAYGabh\">1. \u7c21\u6f54\u660e\u77ad<\/h3>\n<p>\u8868\u5225\u540d\u61c9\u8a72\u7c21\u77ed\u4e14\u6613\u65bc\u8a18\u61b6\u3002\u907f\u514d\u4f7f\u7528\u904e\u9577\u6216\u904e\u65bc\u8907\u96dc\u7684\u540d\u7a31\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u201cproduct_details\u201d\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\u201cpd\u201d\u4f5c\u70ba\u5225\u540d\u3002<\/p>\n<h3 id=\"2-%e5%85%b7%e6%8f%8f%e8%bf%b0%e6%80%a7-NZxOAYGabh\">2. 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\u4e00\u81f4\u6027<\/h3>\n<p>\u5728\u6574\u500b\u6578\u64da\u5eab\u4e2d\u4fdd\u6301\u547d\u540d\u7684\u4e00\u81f4\u6027\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9078\u64c7\u4e00\u7a2e\u547d\u540d\u898f\u5247\u4e26\u5728\u6240\u6709\u67e5\u8a62\u4e2d\u9075\u5faa\u5b83\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u78bc\u7684\u53ef\u7dad\u8b77\u6027\u3002\u4f8b\u5982\uff0c\u5982\u679c\u9078\u64c7\u4f7f\u7528\u201cu\u201d\u4f5c\u70ba\u201cusers\u201d\u8868\u7684\u5225\u540d\uff0c\u90a3\u9ebc\u5728\u6240\u6709\u76f8\u95dc\u67e5\u8a62\u4e2d\u90fd\u61c9\u4f7f\u7528\u76f8\u540c\u7684\u5225\u540d\u3002<\/p>\n<h3 id=\"4-%e9%81%bf%e5%85%8d%e4%bd%bf%e7%94%a8%e4%bf%9d%e7%95%99%e5%ad%97-NZxOAYGabh\">4. \u907f\u514d\u4f7f\u7528\u4fdd\u7559\u5b57<\/h3>\n<p>\u5728\u547d\u540d\u8868\u5225\u540d\u6642\uff0c\u61c9\u907f\u514d\u4f7f\u7528SQL\u7684\u4fdd\u7559\u5b57\uff0c\u5982\u201cselect\u201d\u3001\u201cfrom\u201d\u3001\u201cwhere\u201d\u7b49\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6f5b\u5728\u7684\u8a9e\u6cd5\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b-NZxOAYGabh\">\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u8868\u5225\u540d\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT u.username, o.order_date \nFROM users AS u \nJOIN orders AS o ON u.id = o.user_id \nWHERE o.status = 'completed';<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86\u201cu\u201d\u4f5c\u70ba\u201cusers\u201d\u8868\u7684\u5225\u540d\uff0c\u4f7f\u7528\u201co\u201d\u4f5c\u70ba\u201corders\u201d\u8868\u7684\u5225\u540d\u3002\u9019\u6a23\u7684\u547d\u540d\u65b9\u5f0f\u4f7f\u5f97\u67e5\u8a62\u8a9e\u53e5\u66f4\u52a0\u7c21\u6f54\uff0c\u4e26\u4e14\u6e05\u695a\u5730\u8868\u9054\u4e86\u6578\u64da\u7684\u4f86\u6e90\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-NZxOAYGabh\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u67e5\u8a62\u4e2d\uff0c\u5408\u7406\u7684\u8868\u5225\u540d\u547d\u540d\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u7684\u53ef\u8b80\u6027\u548c\u6548\u7387\u3002\u901a\u904e\u9075\u5faa\u7c21\u6f54\u660e\u77ad\u3001\u5177\u63cf\u8ff0\u6027\u3001\u4e00\u81f4\u6027\u548c\u907f\u514d\u4fdd\u7559\u5b57\u7684\u539f\u5247\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5275\u5efa\u51fa\u66f4\u6613\u65bc\u7406\u89e3\u548c\u7dad\u8b77\u7684\u67e5\u8a62\u8a9e\u53e5\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u4f86\u8aaa\uff0c\u9019\u4e00\u9ede\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u63d0\u5347\u60a8\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u90fd\u80fd\u70ba\u60a8\u7684\u696d\u52d9\u5e36\u4f86\u66f4\u5927\u7684\u6548\u76ca\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u70ba\u6578\u64da\u5eab\u8868\u53d6\u5225\u540d\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u4e26\u5b78\u7fd2\u6700\u4f73\u547d\u540d\u5be6\u8e10\uff0c\u8b93\u6578\u64da\u7ba1\u7406\u66f4\u7c21\u4fbf\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-186128","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186128","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=186128"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186128\/revisions"}],"predecessor-version":[{"id":186129,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186128\/revisions\/186129"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}