{"id":175417,"date":"2024-11-08T05:42:22","date_gmt":"2024-11-07T21:42:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175417\/"},"modified":"2024-11-08T05:42:22","modified_gmt":"2024-11-07T21:42:22","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e5%b0%87%e5%85%a9%e5%80%8b%e8%a1%a8%e6%a0%bc%e5%90%88%e4%bd%b5%e4%b8%94%e5%8e%bb%e9%99%a4%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%ef%bc%9f-%e5%85%a9%e5%88%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175417\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528SQL\u5c07\u5169\u500b\u8868\u683c\u5408\u4f75\u4e14\u53bb\u9664\u91cd\u8907\u6578\u64da\uff1f (\u5169\u5217\u5408\u4f75\u53bb\u91cd\u7684\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e5%b0%87%e5%85%a9%e5%80%8b%e8%a1%a8%e6%a0%bc%e5%90%88%e4%bd%b5%e4%b8%94%e5%8e%bb%e9%99%a4%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%ef%bc%9f-%e5%85%a9%e5%88%97-bcriJgMtif\">\u5982\u4f55\u4f7f\u7528SQL\u5c07\u5169\u500b\u8868\u683c\u5408\u4f75\u4e14\u53bb\u9664\u91cd\u8907\u6578\u64da\uff1f (\u5169\u5217\u5408\u4f75\u53bb\u91cd\u7684\u6578\u64da\u5eab)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u5408\u4f75\u5169\u500b\u8868\u683c\u4e26\u53bb\u9664\u91cd\u8907\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u9019\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u7684\u6574\u6f54\u6027\uff0c\u9084\u80fd\u589e\u5f37\u67e5\u8a62\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u5be6\u73fe\u9019\u4e00\u76ee\u6a19\uff0c\u4e26\u63d0\u4f9b\u5177\u9ad4\u7684\u7bc4\u4f8b\u548c\u6b65\u9a5f\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-bcriJgMtif\">\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u9032\u884c\u8868\u683c\u5408\u4f75\u4e4b\u524d\uff0c\u6211\u5011\u9700\u8981\u4e86\u89e3\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5408\u4f75\u8868\u683c\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528JOIN\u64cd\u4f5c\uff0c\u800c\u53bb\u9664\u91cd\u8907\u6578\u64da\u5247\u53ef\u4ee5\u901a\u904eDISTINCT\u95dc\u9375\u5b57\u4f86\u5be6\u73fe\u3002<\/p>\n<h2 id=\"%e5%90%88%e4%bd%b5%e8%a1%a8%e6%a0%bc%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95-bcriJgMtif\">\u5408\u4f75\u8868\u683c\u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\u683c\uff1a<code>table1<\/code>\u548c<code>table2<\/code>\uff0c\u5b83\u5011\u90fd\u6709\u4e00\u500b\u540d\u70ba<code>column1<\/code>\u7684\u5217\u3002\u6211\u5011\u5e0c\u671b\u5c07\u9019\u5169\u500b\u8868\u683c\u4e2d\u7684\u6578\u64da\u5408\u4f75\u5230\u4e00\u500b\u65b0\u7684\u8868\u683c\u4e2d\uff0c\u4e26\u53bb\u9664\u91cd\u8907\u7684\u6578\u64da\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b%e8%a1%a8%e6%a0%bc-bcriJgMtif\">\u7bc4\u4f8b\u8868\u683c<\/h3>\n<pre>\n-- table1\n+----------+\n| column1  |\n+----------+\n| A        |\n| B        |\n| C        |\n+----------+\n\n-- table2\n+----------+\n| column1  |\n+----------+\n| B        |\n| C        |\n| D        |\n+----------+\n<\/pre>\n<h3 id=\"%e5%90%88%e4%bd%b5%e4%b8%a6%e5%8e%bb%e9%99%a4%e9%87%8d%e8%a4%87%e6%95%b8%e6%93%9a%e7%9a%84sql%e8%aa%9e%e5%8f%a5-bcriJgMtif\">\u5408\u4f75\u4e26\u53bb\u9664\u91cd\u8907\u6578\u64da\u7684SQL\u8a9e\u53e5<\/h3>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u5408\u4f75\u9019\u5169\u500b\u8868\u683c\u4e26\u53bb\u9664\u91cd\u8907\u7684\u6578\u64da\uff1a<\/p>\n<pre>\nSELECT DISTINCT column1\nFROM table1\nUNION\nSELECT DISTINCT column1\nFROM table2;\n<\/pre>\n<p>\u5728\u9019\u6bb5SQL\u8a9e\u53e5\u4e2d\uff0c<code>UNION<\/code>\u64cd\u4f5c\u7b26\u7528\u65bc\u5408\u4f75\u5169\u500b\u67e5\u8a62\u7684\u7d50\u679c\uff0c\u800c<code>DISTINCT<\/code>\u95dc\u9375\u5b57\u5247\u78ba\u4fdd\u4e86\u6700\u7d42\u7d50\u679c\u4e2d\u4e0d\u6703\u51fa\u73fe\u91cd\u8907\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e9%80%b2%e4%b8%80%e6%ad%a5%e7%9a%84%e7%af%84%e4%be%8b%ef%bc%9a%e5%90%88%e4%bd%b5%e5%a4%9a%e5%88%97-bcriJgMtif\">\u9032\u4e00\u6b65\u7684\u7bc4\u4f8b\uff1a\u5408\u4f75\u591a\u5217<\/h2>\n<p>\u5982\u679c\u6211\u5011\u7684\u8868\u683c\u4e2d\u6709\u591a\u500b\u5217\u9700\u8981\u5408\u4f75\uff0c\u4f8b\u5982<code>table1<\/code>\u548c<code>table2<\/code>\u90fd\u6709<code>column1<\/code>\u548c<code>column2<\/code>\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre>\nSELECT DISTINCT column1, column2\nFROM table1\nUNION\nSELECT DISTINCT column1, column2\nFROM table2;\n<\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u5920\u5408\u4f75\u5169\u500b\u8868\u683c\u4e2d\u7684\u591a\u5217\u6578\u64da\uff0c\u4e26\u53bb\u9664\u91cd\u8907\u7684\u884c\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-bcriJgMtif\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u4f7f\u7528<code>UNION<\/code>\u6642\uff0c\u5169\u500b\u67e5\u8a62\u7684\u5217\u6578\u548c\u6578\u64da\u985e\u578b\u5fc5\u9808\u76f8\u540c\u3002<\/li>\n<li>\u5982\u679c\u9700\u8981\u4fdd\u7559\u91cd\u8907\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528<code>UNION ALL<\/code>\uff0c\u9019\u6a23\u4e0d\u6703\u53bb\u9664\u91cd\u8907\u7684\u884c\u3002<\/li>\n<li>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u5408\u4f75\u64cd\u4f5c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u5efa\u8b70\u5728\u5fc5\u8981\u6642\u9032\u884c\u7d22\u5f15\u512a\u5316\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-bcriJgMtif\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u4f7f\u7528SQL\u7684<code>UNION<\/code>\u548c<code>DISTINCT<\/code>\u95dc\u9375\u5b57\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5c07\u5169\u500b\u8868\u683c\u5408\u4f75\u4e26\u53bb\u9664\u91cd\u8907\u6578\u64da\u3002\u9019\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u7684\u6574\u6f54\u6027\uff0c\u9084\u80fd\u589e\u5f37\u67e5\u8a62\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9032\u884c\u6578\u64da\u8655\u7406\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u7684SQL\u64cd\u4f5c\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684\u6578\u64da\u5eab\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u548c\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528SQL\u5408\u4f75\u5169\u500b\u8868\u683c\u4e26\u53bb\u9664\u91cd\u8907\u6578\u64da\uff0c\u638c\u63e1\u6709\u6548\u7684\u6578\u64da\u5eab\u7ba1\u7406\u6280\u5de7\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-175417","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175417","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=175417"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175417\/revisions"}],"predecessor-version":[{"id":175418,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175417\/revisions\/175418"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}