{"id":200347,"date":"2025-05-06T12:42:00","date_gmt":"2025-05-06T04:42:00","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200347\/"},"modified":"2025-05-06T12:42:00","modified_gmt":"2025-05-06T04:42:00","slug":"%e5%a6%82%e4%bd%95%e9%81%bf%e5%85%8d%e7%ac%9b%e5%8d%a1%e5%b0%94%e7%a7%af%e6%8f%90%e9%ab%98%e5%85%b3%e7%b3%bb%e6%95%b0%e6%8d%ae%e5%ba%93%e6%9f%a5%e8%af%a2%e6%95%88%e7%8e%87%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200347\/","title":{"rendered":"\u5982\u4f55\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u63d0\u9ad8\u5173\u7cfb\u6570\u636e\u5e93\u67e5\u8be2\u6548\u7387\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5982\u4f55\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u63d0\u9ad8\u5173\u7cfb\u6570\u636e\u5e93\u67e5\u8be2\u6548\u7387\uff1f<\/h1>\n<p>\u6570\u636e\u5e93\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300a\u5982\u4f55\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u63d0\u9ad8\u5173\u7cfb\u6570\u636e\u5e93\u67e5\u8be2\u6548\u7387\uff1f\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241102\/17305299456725ca99b9da9.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u7684\u6570\u636e\u5e93\u67e5\u8be2<\/strong><\/p>\n<p>\u5728\u5173\u7cfb\u6570\u636e\u5e93\u7cfb\u7edf\u4e2d\uff0c\u67e5\u8be2\u6548\u7387\u81f3\u5173\u91cd\u8981\u3002\u5f53\u6d89\u53ca\u591a\u4e2a\u8868\u65f6\uff0c\u4e86\u89e3\u5982\u4f55\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u5c24\u4e3a\u91cd\u8981\uff0c\u8fd9\u4f1a\u6781\u5927\u5730\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u793a\u4f8b\uff1a\u8868 a \u5305\u542b\u59d3\u540d\uff0c\u8868 b \u5305\u542b\u7701\u4efd\u3002\u8981\u67e5\u627e\u59d3\u540d\u4e3a\u201c\u5f20\u4e09\u201d\u4e14\u4f4d\u4e8e\u201c\u4e0a\u6d77\u201d\u7684\u6570\u636e\uff0c\u6700\u521d\u7684\u67e5\u8be2\u53ef\u80fd\u5982\u4e0b\uff1a<\/p>\n<pre>select * from a\u8868, b\u8868 where a.name = '\u5f20\u4e09' and b.\u7701\u4efd = '\u4e0a\u6d77'<\/pre>\n<p>\u7136\u800c\uff0c\u5982\u679c\u6ca1\u6709\u6761\u4ef6\uff0c\u8fd9\u79cd\u67e5\u8be2\u5c06\u8fd4\u56de\u4e24\u4e2a\u8868\u7684\u4e58\u79ef\uff0c\u5373\u7b1b\u5361\u5c14\u79ef\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528\u5173\u8054\u3002<\/p>\n<p>\u7531\u4e8e\u8868 c \u4e0e a \u548c b \u90fd\u5b58\u5728\u5173\u8054\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 c \u8868\u4f5c\u4e3a\u6865\u63a5\u3002<\/p>\n<p><strong>\u4f7f\u7528\u8fde\u63a5\u5173\u8054\u8868<\/strong><\/p>\n<p>\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u8fde\u63a5\u5173\u8054 c \u548c a \u8868\uff0c\u6309\u59d3\u540d\u8fdb\u884c\u7b5b\u9009\uff1a<\/p>\n<pre>select * from a inner join c on a.id = c.nid where a.name = '\u5f20\u4e09'<\/pre>\n<p>\u7136\u540e\u5c06\u7ed3\u679c\u4e0e b \u8868\u8fde\u63a5\uff0c\u6309\u7701\u4efd\u8fdb\u884c\u7b5b\u9009\uff1a<\/p>\n<pre>select * from (\n  select a.*, c.sid\n  from a inner join c on a.id = c.nid\n  where a.name = '\u5f20\u4e09'\n) x inner join b on b.id = x.sid where b.\u7701\u4efd = '\u4e0a\u6d77'<\/pre>\n<p>\u5408\u5e76\u8fd9\u4e24\u90e8\u5206\uff0c\u5f97\u5230\u6700\u7ec8\u67e5\u8be2\uff1a<\/p>\n<pre>select a.*, b.*\nfrom c\n  inner join a on c.nid = a.id\n  inner join b on c.sid = b.id\nwhere a.name = '\u5f20\u4e09' and b.\u7701\u4efd = '\u4e0a\u6d77'<\/pre>\n<p>\u8fd9\u79cd\u67e5\u8be2\u907f\u514d\u4e86\u7b1b\u5361\u5c14\u79ef\uff0c\u6709\u6548\u5730\u7b5b\u9009\u4e86\u6570\u636e\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u63d0\u9ad8\u5173\u7cfb\u6570\u636e\u5e93\u67e5\u8be2\u6548\u7387\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u907f\u514d\u7b1b\u5361\u5c14\u79ef\u63d0\u9ad8\u5173\u7cfb\u6570\u636e\u5e93\u67e5&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200347","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200347","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200347"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200347\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}