{"id":200328,"date":"2025-05-06T09:49:34","date_gmt":"2025-05-06T01:49:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200328\/"},"modified":"2025-05-06T09:49:34","modified_gmt":"2025-05-06T01:49:34","slug":"%e5%a6%82%e4%bd%95%e6%89%be%e5%87%ba%e5%9c%a8%e7%89%b9%e5%ae%9a%e6%97%a5%e6%9c%9f%e5%86%85%e5%a7%8b%e7%bb%88%e6%9c%89%e5%ba%93%e5%ad%98%e7%9a%84%e5%95%86%e5%ba%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200328\/","title":{"rendered":"\u5982\u4f55\u627e\u51fa\u5728\u7279\u5b9a\u65e5\u671f\u5185\u59cb\u7ec8\u6709\u5e93\u5b58\u7684\u5546\u5e97\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u5982\u4f55\u627e\u51fa\u5728\u7279\u5b9a\u65e5\u671f\u5185\u59cb\u7ec8\u6709\u5e93\u5b58\u7684\u5546\u5e97\uff1f<\/h1>\n<p>\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\uff0c\u6216\u8005\u662f\u5bf9\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241101\/17304656686724cf8474f0f.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u627e\u51fa\u5df2\u77e5\u65e5\u671f\u5185\u59cb\u7ec8\u6709\u5e93\u5b58\u7684\u5546\u5e97<\/strong><\/p>\n<p>\u6211\u4eec\u6709\u4e00\u4e2a\u8868\u683c\uff0c\u5176\u4e2d\u8bb0\u5f55\u4e86\u5546\u5e97\u3001\u65e5\u671f\u548c\u5546\u54c1\u5e93\u5b58\u4fe1\u606f\u3002\u73b0\u5728\uff0c\u6211\u4eec\u9700\u8981\u627e\u51fa\u5728\u7279\u5b9a\u65e5\u671f\uff089 \u6708 1 \u65e5\u30012 \u65e5\u548c 3 \u65e5\uff09\u5185\u59cb\u7ec8\u6709\u5e93\u5b58\u7684\u5546\u5e97\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 sql \u67e5\u8be2\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u4ee5\u4e0b\u662f\u5b9e\u73b0\u601d\u8def\uff1a<\/p>\n<ol>\n<li><strong>\u4f7f\u7528 union \u5b50\u67e5\u8be2\u521b\u5efa\u4e00\u5f20\u4e34\u65f6\u8868\uff1a<\/strong>\u5bf9\u4e8e\u6bcf\u4e2a\u9700\u8981\u68c0\u67e5\u7684\u65e5\u671f\uff0c\u521b\u5efa\u4e00\u4e2a\u5b50\u67e5\u8be2\u4ee5\u8fd4\u56de\u5546\u5e97\u5217\u8868\u3002\u7136\u540e\uff0c\u4f7f\u7528 union \u64cd\u4f5c\u7b26\u5c06\u8fd9\u4e9b\u5b50\u67e5\u8be2\u7684\u7ed3\u679c\u5408\u5e76\u5230\u4e00\u5f20\u4e34\u65f6\u8868\u4e2d\u3002<\/li>\n<li><strong>\u5bf9\u5546\u5e97\u8fdb\u884c\u5206\u7ec4\u8ba1\u6570\uff1a<\/strong>\u4f7f\u7528 group by \u5b50\u53e5\u6309\u5546\u5e97\u5206\u7ec4\u4e34\u65f6\u8868\u4e2d\u7684\u8bb0\u5f55\u3002\u7136\u540e\uff0c\u4f7f\u7528 count(distinct \u65e5\u671f) \u51fd\u6570\u8ba1\u7b97\u6bcf\u4e2a\u5546\u5e97\u5728\u4e0d\u540c\u65e5\u671f\u51fa\u73b0\u7684\u6b21\u6570\u3002<\/li>\n<li><strong>\u7b5b\u9009\u8ba1\u6570\u7b49\u4e8e\u65e5\u671f\u6570\u91cf\u7684\u5546\u5e97\uff1a<\/strong>\u4f7f\u7528 having \u5b50\u53e5\u8fc7\u6ee4\u7ed3\u679c\uff0c\u4ec5\u4fdd\u7559\u8ba1\u6570\u7b49\u4e8e\u68c0\u67e5\u65e5\u671f\u6570\u91cf\uff08\u5728\u672c\u4f8b\u4e2d\u4e3a 3\uff09\u7684\u5546\u5e97\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u67e5\u8be2\uff1a<\/p>\n<pre>SELECT DISTINCT \u5546\u5e97\nFROM (\n    SELECT \u5546\u5e97 FROM \u8868 WHERE \u65e5\u671f='2021-09-01'\n    UNION\n    SELECT \u5546\u5e97 FROM \u8868 WHERE \u65e5\u671f='2021-09-02'\n    UNION\n    SELECT \u5546\u5e97 FROM \u8868 WHERE \u65e5\u671f='2021-09-03'\n) AS tab\nGROUP BY \u5546\u5e97\nHAVING COUNT(DISTINCT \u65e5\u671f)=3;<\/pre>\n<p>\u8fd9\u4e2a\u67e5\u8be2\u5c06\u8fd4\u56de 9 \u6708 1 \u65e5\u30012 \u65e5\u548c 3 \u65e5\u90fd\u6709\u5e93\u5b58\u7684\u5546\u5e97\u5217\u8868\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u627e\u51fa\u5728\u7279\u5b9a\u65e5\u671f\u5185\u59cb\u7ec8\u6709\u5e93\u5b58\u7684\u5546\u5e97\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u5427\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u627e\u51fa\u5728\u7279\u5b9a\u65e5\u671f\u5185\u59cb\u7ec8\u6709\u5e93\u5b58\u7684&#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-200328","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200328","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=200328"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200328\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200328"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200328"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200328"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}