{"id":200352,"date":"2025-05-06T09:16:39","date_gmt":"2025-05-06T01:16:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200352\/"},"modified":"2025-05-06T09:16:39","modified_gmt":"2025-05-06T01:16:39","slug":"mysql-join-%e6%93%8d%e4%bd%9c%e4%b8%ad%e4%b8%b4%e6%97%b6%e8%a1%a8%e5%ad%97%e6%ae%b5%e7%bb%93%e6%9e%84%ef%bc%9a%e5%85%a8%e8%bf%9e%e6%8e%a5%e8%bf%98%e6%98%af%e9%83%a8%e5%88%86%e8%bf%9e%e6%8e%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200352\/","title":{"rendered":"MySQL Join \u64cd\u4f5c\u4e2d\u4e34\u65f6\u8868\u5b57\u6bb5\u7ed3\u6784\uff1a\u5168\u8fde\u63a5\u8fd8\u662f\u90e8\u5206\u8fde\u63a5\uff1f"},"content":{"rendered":"

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

MySQL Join \u64cd\u4f5c\u4e2d\u4e34\u65f6\u8868\u5b57\u6bb5\u7ed3\u6784\uff1a\u5168\u8fde\u63a5\u8fd8\u662f\u90e8\u5206\u8fde\u63a5\uff1f<\/h1>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

<\/p>\n

mysql join \u64cd\u4f5c\u4e2d\u7684\u4e34\u65f6\u8868\u5b57\u6bb5\u7ed3\u6784<\/strong><\/p>\n

\u5728 mysql \u4e2d\u6267\u884c\u8868\u8fde\u63a5\u64cd\u4f5c\u65f6\uff0c\u7cfb\u7edf\u4f1a\u751f\u6210\u4e00\u4e2a\u4e34\u65f6\u8868\u3002\u5173\u4e8e\u8fd9\u4e2a\u4e34\u65f6\u8868\u7684\u5b57\u6bb5\u7ed3\u6784\uff0c\u5b58\u5728\u4e24\u79cd\u4e0d\u540c\u7684\u60c5\u51b5\uff1a<\/p>\n

\u60c5\u51b5 1\uff1a\u5168\u8fde\u63a5\u4e34\u65f6\u8868<\/strong><\/p>\n

\u4e34\u65f6\u8868\u4e2d\u5305\u542b\u8fde\u63a5\u8bed\u53e5\u4e2d\u6d89\u53ca\u5230\u7684\u6240\u6709\u8868\u4e2d\u7684\u6240\u6709\u5b57\u6bb5\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4e34\u65f6\u8868\u5c06\u7c7b\u4f3c\u4e8e\u4ee5\u4e0b\u683c\u5f0f\uff1a<\/p>\n

\u4e34\u65f6\u8868 m\uff1a\na.id         a.name        a.status        a.delete_sign        b.id         b.a_id        b.status        b.delete_sign<\/pre>\n
\u8fd9\u79cd\u5168\u8fde\u63a5\u4e34\u65f6\u8868\u4f1a\u5305\u542b\u5927\u91cf\u5b57\u6bb5\uff0c\u5982\u679c\u8868\u4e2d\u7684\u5b57\u6bb5\u6570\u91cf\u8f83\u591a\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u3002<\/p>\n
\u60c5\u51b5 2\uff1a\u90e8\u5206\u8fde\u63a5\u4e34\u65f6\u8868<\/strong><\/p>\n
\u4e34\u65f6\u8868\u4e2d\u4ec5\u5305\u542b\u8fde\u63a5\u8bed\u53e5\u4e2d\u4f7f\u7528\u7684\u5b57\u6bb5\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4e34\u65f6\u8868\u5c06\u7c7b\u4f3c\u4e8e\u4ee5\u4e0b\u683c\u5f0f\uff1a<\/p>\n
\u4e34\u65f6\u8868 n\uff1a\na.id         a.name        a.status        a.delete_sign        b.delete_sign<\/pre>\n
\u8fd9\u79cd\u90e8\u5206\u8fde\u63a5\u4e34\u65f6\u8868\u53ea\u5305\u542b\u5fc5\u8981\u7684\u5b57\u6bb5\uff0c\u56e0\u6b64\u4e0d<\/strong>\u4f1a\u5f15\u8d77\u4e0e\u5168\u8fde\u63a5\u4e34\u65f6\u8868\u76f8\u540c\u7a0b\u5ea6\u7684\u6027\u80fd\u95ee\u9898\u3002<\/p>\n
\u5177\u4f53\u60c5\u51b5<\/strong><\/p>\n
\u5728\u60a8\u63d0\u4f9b\u7684\u793a\u4f8b\u4e2d\uff0c\u60a8\u6267\u884c\u4e86\u4ee5\u4e0b\u8fde\u63a5\u8bed\u53e5\uff1a<\/p>\n
select a.id, a.name, a.status, a.delete_sign\nfrom a a\ninner join b b on a.id = b.a_id\nwhere b.delete_sign = 0;<\/pre>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u751f\u6210\u7684\u4e34\u65f6\u8868\u5e94\u8be5\u662f \u60c5\u51b5 2<\/strong> \u4e2d\u7684\u90e8\u5206\u8fde\u63a5\u4e34\u65f6\u8868\uff0c\u56e0\u4e3a\u5b83\u53ea\u5305\u542b\u8fde\u63a5\u8bed\u53e5\u4e2d\u4f7f\u7528\u7684\u5b57\u6bb5\u3002\u56e0\u6b64\uff0c\u4e34\u65f6\u8868\u5e94\u8be5\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
\u4e34\u65f6\u8868 n\uff1a\na.id         a.name        a.status        a.delete_sign        b.delete_sign<\/pre>\n
\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aMySQL Join \u64cd\u4f5c\u4e2d\u4e34\u65f6\u8868\u5b57\u6bb5\u7ed3\u6784\uff1a\u5168\u8fde\u63a5\u8fd8\u662f\u90e8\u5206\u8fde\u63a5\uff1f\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
MySQL Join \u64cd\u4f5c\u4e2d\u4e34\u65f6...<\/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-200352","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200352","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=200352"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200352\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200352"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}