{"id":203368,"date":"2025-05-22T10:01:21","date_gmt":"2025-05-22T02:01:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203368\/"},"modified":"2025-05-22T10:01:21","modified_gmt":"2025-05-22T02:01:21","slug":"%e4%b8%80%e5%8d%83%e4%b8%87%e6%9d%a1%e6%95%b0%e6%8d%ae%ef%bc%81%e5%a6%82%e4%bd%95%e8%ae%a9-mysql-%e6%a8%a1%e7%b3%8a%e6%90%9c%e7%b4%a2%e5%bf%ab%e5%a6%82%e9%97%aa%e7%94%b5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203368\/","title":{"rendered":"## \u4e00\u5343\u4e07\u6761\u6570\u636e\uff01\u5982\u4f55\u8ba9 MySQL \u6a21\u7cca\u641c\u7d22\u5feb\u5982\u95ea\u7535\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>## \u4e00\u5343\u4e07\u6761\u6570\u636e\uff01\u5982\u4f55\u8ba9 MySQL \u6a21\u7cca\u641c\u7d22\u5feb\u5982\u95ea\u7535\uff1f<\/h1>\n<p>\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a## \u4e00\u5343\u4e07\u6761\u6570\u636e\uff01\u5982\u4f55\u8ba9 MySQL \u6a21\u7cca\u641c\u7d22\u5feb\u5982\u95ea\u7535\uff1f\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241106\/1730883093672b2e15900d6.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u5728\u4e00\u5343\u4e07\u6761\u6570\u636e\u91cf\u4e2d\u5feb\u901f\u5b9e\u73b0 mysql \u6a21\u7cca\u641c\u7d22<\/strong><\/p>\n<p><strong>\u95ee\u9898\u63cf\u8ff0\uff1a<\/strong><\/p>\n<p>\u9700\u8981\u5728\u5305\u542b\u4e00\u5343\u4e07\u6761\u6570\u636e\u7684 mysql \u6570\u636e\u5e93\u4e2d\u8fdb\u884c\u6a21\u7cca\u67e5\u8be2\uff0c\u4f46\u7531\u4e8e\u7d22\u5f15\u9650\u5236\uff0c\u67e5\u8be2\u5341\u5206\u7f13\u6162\uff0c\u8017\u65f6\u7ea6 10 \u79d2\u3002\u76ee\u524d\u5df2\u5c1d\u8bd5\u4e86\u591a\u79cd\u65b9\u6cd5\uff0c\u4f46\u6548\u679c\u4e0d\u7406\u60f3\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<p>\u867d\u7136\u6a21\u7cca\u641c\u7d22\u901a\u5e38\u65e0\u6cd5\u8d70\u7d22\u5f15\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u79cd\u5b9a\u5236\u7d22\u5f15\uff0c\u4ee5\u5e2e\u52a9\u52a0\u901f\u641c\u7d22\u8fc7\u7a0b\u3002<\/p>\n<p><strong>\u5b9a\u5236\u7d22\u5f15\uff1a<\/strong><\/p>\n<p>\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a &#8220;\u7d22\u5f15\u8868&#8221; \u7684\u8868\uff0c\u5176\u4e2d\u5b58\u50a8\u4ee5\u4e0b\u4fe1\u606f\uff1a<\/p>\n<ul>\n<li>\u5f53\u524d\u8bcd<\/li>\n<li>\u4e0b\u4e00\u8bcd<\/li>\n<li>\u539f\u59cb\u8bb0\u5f55\u7684\u4e3b\u952e id<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5bf9\u4e8e\u5173\u952e\u8bcd &#8220;\u6a21\u7cca\u641c\u7d22&#8221;\uff0c\u7d22\u5f15\u8868\u5982\u4e0b\uff1a<\/p>\n<pre>| \u5f53\u524d\u8bcd | \u4e0b\u4e00\u8bcd | \u539f\u59cb\u8bb0\u5f55\u4e3b\u952e id |\n|---|---|---|\n| \u6a21\u7cca | \u4e00 | 1 |\n| \u4e00 | \u5343 | 1 |\n| \u5343 | \u4e07 | 1 |\n| \u4e07 | \u7684 | 1 |\n| ... | ... | ... |\n| \u6a21\u7cca | \u641c | 1 |\n| \u641c | \u7d22 | 1 |\n| \u7d22 | null | 1 |<\/pre>\n<p><strong>\u641c\u7d22\u7b97\u6cd5\uff1a<\/strong><\/p>\n<p>\u6839\u636e\u6211\u4eec\u521b\u5efa\u7684\u5b9a\u5236\u7d22\u5f15\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u4ee5\u4e0b\u641c\u7d22\u7b97\u6cd5\uff1a<\/p>\n<ol>\n<li>\u5c06\u67e5\u8be2\u5173\u952e\u8bcd\u62c6\u5206\u4e3a\u7a7a\u683c\u5206\u9694\u7684\u672f\u8bed\u3002<\/li>\n<li>\u5bf9\u4e8e\u6bcf\u4e2a\u672f\u8bed\uff0c\u67e5\u627e\u7d22\u5f15\u8868\u4e2d\u5f53\u524d\u8bcd\u4e0e\u8be5\u672f\u8bed\u76f8\u5339\u914d\u7684\u8bb0\u5f55\u3002<\/li>\n<li>\u5c06\u8fd9\u4e9b\u8bb0\u5f55\u7684\u539f\u59cb\u8bb0\u5f55\u4e3b\u952e id \u5b58\u50a8\u5230\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002<\/li>\n<li>\u91cd\u590d\u6b65\u9aa4 2 \u548c 3\uff0c\u76f4\u5230\u67e5\u8be2\u4e2d\u6240\u6709\u672f\u8bed\u90fd\u88ab\u5904\u7406\u3002<\/li>\n<li>\u67e5\u627e\u6570\u7ec4\u4e2d\u6240\u6709\u539f\u59cb\u8bb0\u5f55\u4e3b\u952e id \u7684\u4ea4\u96c6\u3002\u8fd9\u4e9b\u5c31\u662f\u5305\u542b\u6240\u6709\u67e5\u8be2\u672f\u8bed\u7684\u8bb0\u5f55\u3002<\/li>\n<\/ol>\n<p><strong>\u793a\u4f8b\u67e5\u8be2\uff1a<\/strong><\/p>\n<p>\u8981\u641c\u7d22 &#8220;\u6a21\u7cca\u641c\u7d22&#8221;\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd0\u884c\u4ee5\u4e0b\u67e5\u8be2\uff1a<\/p>\n<pre>SELECT \u539f\u8bb0\u5f55\u4e3b\u952eID\nFROM (SELECT \u539f\u8bb0\u5f55\u4e3b\u952eID FROM \u7d22\u5f15\u8868 WHERE \u5f53\u524d\u8bcd = '\u6a21\u7cca' AND \u4e0b\u4e00\u8bcd = '\u4e00')\nJOIN (SELECT \u539f\u8bb0\u5f55\u4e3b\u952eID FROM \u7d22\u5f15\u8868 WHERE \u5f53\u524d\u8bcd = '\u4e00' AND \u4e0b\u4e00\u8bcd = '\u5343') USING(\u539f\u8bb0\u5f55\u4e3b\u952eID)\nJOIN (SELECT \u539f\u8bb0\u5f55\u4e3b\u952eID FROM \u7d22\u5f15\u8868 WHERE \u5f53\u524d\u8bcd = '\u5343' AND \u4e0b\u4e00\u8bcd = '\u4e07') USING(\u539f\u8bb0\u5f55\u4e3b\u952eID)\nJOIN (SELECT \u539f\u8bb0\u5f55\u4e3b\u952eID FROM \u7d22\u5f15\u8868 WHERE \u5f53\u524d\u8bcd = '\u4e07' AND \u4e0b\u4e00\u8bcd IS NULL) USING(\u539f\u8bb0\u5f55\u4e3b\u952eID)<\/pre>\n<p><strong>\u6027\u80fd\u4f18\u5316\uff1a<\/strong><\/p>\n<ul>\n<li>\u786e\u4fdd\u7d22\u5f15\u8868\u4e2d\u4e3b\u952e\u5217\u7ecf\u8fc7\u7d22\u5f15\u4f18\u5316\u3002<\/li>\n<li>\u901a\u8fc7\u4f7f\u7528 join \u800c\u4e0d\u662f\u5d4c\u5957\u67e5\u8be2\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<li>\u6839\u636e\u67e5\u8be2\u9891\u7387\u548c\u6570\u636e\u91cf\u8c03\u6574\u7d22\u5f15\u8868\u3002<\/li>\n<li>\u901a\u8fc7\u4f7f\u7528\u8bf8\u5982 &#8220;\u9884\u5148\u641c\u7d22&#8221; \u4e4b\u7c7b\u7684\u6280\u672f\uff0c\u8fdb\u4e00\u6b65\u63d0\u9ad8\u641c\u7d22\u901f\u5ea6\u3002<\/li>\n<\/ul>\n<p><strong>\u5176\u4ed6\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n<ul>\n<li>\u8fd9\u4e2a\u89e3\u51b3\u65b9\u6848\u9700\u8981\u5bf9\u539f\u59cb\u6570\u636e\u8fdb\u884c\u9884\u5904\u7406\uff0c\u4ee5\u751f\u6210\u5b9a\u5236\u7d22\u5f15\u3002<\/li>\n<li>\u8be5\u7d22\u5f15\u53ef\u80fd\u9700\u8981\u5b9a\u671f\u66f4\u65b0\uff0c\u4ee5\u53cd\u6620\u6570\u636e\u4e2d\u7684\u66f4\u6539\u3002<\/li>\n<li>\u6b64\u65b9\u6cd5\u53ef\u80fd\u4e0d\u9002\u7528\u4e8e\u5177\u6709\u5927\u91cf\u5197\u4f59\u6570\u636e\u7684\u6570\u636e\u5e93\u3002<\/li>\n<\/ul>\n<p>\u672c\u7bc7\u5173\u4e8e\u300a## \u4e00\u5343\u4e07\u6761\u6570\u636e\uff01\u5982\u4f55\u8ba9 MySQL \u6a21\u7cca\u641c\u7d22\u5feb\u5982\u95ea\u7535\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>## \u4e00\u5343\u4e07\u6761\u6570\u636e\uff01\u5982\u4f55\u8ba9 My&#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":[4925],"tags":[],"class_list":["post-203368","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203368","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=203368"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203368\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}