{"id":200332,"date":"2025-05-06T12:13:30","date_gmt":"2025-05-06T04:13:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200332\/"},"modified":"2025-05-06T12:13:30","modified_gmt":"2025-05-06T04:13:30","slug":"%e5%a6%82%e4%bd%95%e9%ab%98%e6%95%88%e6%9f%a5%e8%af%a2%e4%b8%a4%e5%bc%a0%e6%97%a0%e7%9b%b4%e6%8e%a5%e5%85%b3%e8%81%94%e5%85%b3%e7%b3%bb%e7%9a%84%e8%a1%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200332\/","title":{"rendered":"\u5982\u4f55\u9ad8\u6548\u67e5\u8be2\u4e24\u5f20\u65e0\u76f4\u63a5\u5173\u8054\u5173\u7cfb\u7684\u8868\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u9ad8\u6548\u67e5\u8be2\u4e24\u5f20\u65e0\u76f4\u63a5\u5173\u8054\u5173\u7cfb\u7684\u8868\uff1f<\/h1>\n

\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n

<\/p>\n

\u6570\u636e\u5e93\u67e5\u8be2\u6548\u7387\u63d0\u5347\u6280\u5de7<\/strong><\/p>\n

\u5728\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e2d\uff0c\u67e5\u8be2\u6548\u7387\u81f3\u5173\u91cd\u8981\u3002\u7279\u522b\u662f\u5f53\u8868\u4e4b\u95f4\u5b58\u5728\u5173\u7cfb\u65f6\uff0c\u4e0d\u5f53\u7684\u67e5\u8be2\u8bed\u53e5\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7b1b\u5361\u5c14\u79ef\uff0c\u663e\u7740\u964d\u4f4e\u67e5\u8be2\u901f\u5ea6\u3002 <\/p>\n

\u5bf9\u4e8e\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n

\u5982\u4f55\u67e5\u8be2\u4e24\u5f20\u65e0\u76f4\u63a5\u5173\u8054\u5173\u7cfb\u7684\u8868\uff0c\u4e14\u6ee1\u8db3\u6761\u4ef6\uff1a\u8868 a \u4e2d\u59d3\u540d\u4e3a\u201c\u5f20\u4e09\u201d\uff0c\u8868 b \u4e2d\u7701\u4efd\u4e3a\u201c\u4e0a\u6d77\u201d\uff1f <\/p>\n

\u793a\u4f8b sql \u8bed\u53e5\uff1a<\/p>\n

select * from a\u8868, b\u8868 where a.name = '\u5f20\u4e09' and b.\u7701\u4efd = '\u4e0a\u6d77'<\/pre>\n
\u5982\u679c\u6761\u4ef6\u4e3a\u7a7a\uff0c\u5219\u4f1a\u4ea7\u751f\u7b1b\u5361\u5c14\u79ef\u95ee\u9898\uff0c\u5bfc\u81f4\u6d77\u91cf\u6570\u636e\u3002 <\/p>\n
\u89e3\u51b3\u65b9\u6848\u4e4b\u4e00\uff1a\u5229\u7528\u7b2c\u4e09\u5f20\u8868 c\uff0c\u8be5\u8868\u4e0e a\u3001b \u90fd\u5b58\u5728\u5173\u8054\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u67e5\u8be2\uff1a<\/p>\n
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
\u4e0a\u8ff0\u67e5\u8be2\u901a\u8fc7\u5148\u5173\u8054 a \u548c c\uff0c\u518d\u5173\u8054 b\uff0c\u907f\u514d\u4e86\u7b1b\u5361\u5c14\u79ef\u3002 <\/p>\n
\u53e6\u5916\uff0c\u7531\u4e8e c \u548c a\u3001b \u90fd\u662f\u591a\u5bf9\u4e00\u5173\u7cfb\uff0c\u8fd8\u53ef\u4ee5\u8003\u8651\u4ee5\u4e0b\u67e5\u8be2\uff1a<\/p>\n
select a.*, b.\u7701\u4efd\nfrom (\n  select a.*, c.sid\n  from a inner join c on a.id = c.nid\n  where a.name = '\u5f20\u4e09'\n) x\ninner join b on b.id = x.sid\nwhere b.\u7701\u4efd = '\u4e0a\u6d77'<\/pre>\n
\u8fd9\u6837\u53ef\u4ee5\u7b80\u5316\u67e5\u8be2\uff0c\u63d0\u9ad8\u6548\u7387\u3002 <\/p>\n
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\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u9ad8\u6548\u67e5\u8be2\u4e24\u5f20\u65e0\u76f4\u63a5\u5173\u8054\u5173\u7cfb\u7684...<\/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-200332","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200332","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=200332"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200332\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}