{"id":80128,"date":"2024-10-16T13:55:16","date_gmt":"2024-10-16T05:55:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/80128\/"},"modified":"2024-10-16T13:55:16","modified_gmt":"2024-10-16T05:55:16","slug":"mysql%e6%8c%87%e4%bb%a4-union-all%ef%bc%88%e5%90%88%e4%bd%b5%e6%89%80%e6%9c%89%e7%b5%90%e6%9e%9c%e9%9b%86%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/80128\/","title":{"rendered":"MySQL\u6307\u4ee4: UNION ALL\uff08\u5408\u4f75\u6240\u6709\u7d50\u679c\u96c6\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-union-all%ef%bc%88%e5%90%88%e4%bd%b5%e6%89%80%e6%9c%89%e7%b5%90%e6%9e%9c%e9%9b%86%ef%bc%89-pfwbUTwrFv\">MySQL\u6307\u4ee4: UNION ALL\uff08\u5408\u4f75\u6240\u6709\u7d50\u679c\u96c6\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u8cc7\u6599\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u5f37\u5927\u7684\u67e5\u8a62\u529f\u80fd\u3002\u5176\u4e2d\uff0c<code>UNION ALL<\/code>\u6307\u4ee4\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5408\u4f75\u591a\u500b\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e<code>UNION ALL<\/code>\u7684\u7528\u6cd5\u3001\u7279\u6027\u53ca\u5176\u8207\u5176\u4ed6\u985e\u4f3c\u6307\u4ee4\u7684\u5340\u5225\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afunion-all%ef%bc%9f-pfwbUTwrFv\">\u4ec0\u9ebc\u662fUNION ALL\uff1f<\/h2>\n<p><code>UNION ALL<\/code>\u662f\u4e00\u500bSQL\u6307\u4ee4\uff0c\u7528\u65bc\u5c07\u5169\u500b\u6216\u591a\u500bSELECT\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u5408\u4f75\u70ba\u4e00\u500b\u7d50\u679c\u96c6\u3002\u8207<code>UNION<\/code>\u4e0d\u540c\u7684\u662f\uff0c<code>UNION ALL<\/code>\u4e0d\u6703\u81ea\u52d5\u53bb\u9664\u91cd\u8907\u7684\u8a18\u9304\uff0c\u9019\u610f\u5473\u8457\u5982\u679c\u591a\u500b\u67e5\u8a62\u8fd4\u56de\u76f8\u540c\u7684\u884c\uff0c\u9019\u4e9b\u884c\u5c07\u5728\u6700\u7d42\u7d50\u679c\u4e2d\u986f\u793a\u591a\u6b21\u3002<\/p>\n<h2 id=\"union-all%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-pfwbUTwrFv\">UNION ALL\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u4f7f\u7528<code>UNION ALL<\/code>\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table1\nWHERE condition1\nUNION ALL\nSELECT column1, column2, ...\nFROM table2\nWHERE condition2;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>column1, column2, ...<\/code>\u662f\u8981\u9078\u64c7\u7684\u6b04\u4f4d\uff0c<code>table1<\/code>\u548c<code>table2<\/code>\u662f\u8981\u67e5\u8a62\u7684\u8cc7\u6599\u8868\uff0c<code>condition1<\/code>\u548c<code>condition2<\/code>\u662f\u67e5\u8a62\u7684\u689d\u4ef6\u3002<\/p>\n<h2 id=\"union-all%e7%9a%84%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-pfwbUTwrFv\">UNION ALL\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528<code>UNION ALL<\/code>\u7684\u7bc4\u4f8b\uff0c\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8cc7\u6599\u8868\uff1a<code>employees<\/code>\u548c<code>contractors<\/code>\uff0c\u6211\u5011\u5e0c\u671b\u7372\u53d6\u6240\u6709\u7684\u54e1\u5de5\u548c\u627f\u5305\u5546\u7684\u59d3\u540d\u3002<\/p>\n<pre><code>SELECT name FROM employees\nUNION ALL\nSELECT name FROM contractors;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u54e1\u5de5\u548c\u627f\u5305\u5546\u7684\u59d3\u540d\uff0c\u5305\u62ec\u91cd\u8907\u7684\u59d3\u540d\u3002\u5982\u679c\u6211\u5011\u5e0c\u671b\u53bb\u9664\u91cd\u8907\u7684\u59d3\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>UNION<\/code>\u6307\u4ee4\u3002<\/p>\n<h2 id=\"union-all%e7%9a%84%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-pfwbUTwrFv\">UNION ALL\u7684\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u7531\u65bc<code>UNION ALL<\/code>\u4e0d\u6703\u53bb\u9664\u91cd\u8907\u7684\u8a18\u9304\uff0c\u56e0\u6b64\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u5b83\u7684\u6027\u80fd\u901a\u5e38\u512a\u65bc<code>UNION<\/code>\u3002\u9019\u662f\u56e0\u70ba<code>UNION<\/code>\u9700\u8981\u984d\u5916\u7684\u8a08\u7b97\u4f86\u6aa2\u67e5\u548c\u53bb\u9664\u91cd\u8907\u7684\u884c\uff0c\u800c<code>UNION ALL<\/code>\u5247\u76f4\u63a5\u5c07\u6240\u6709\u7d50\u679c\u5408\u4f75\u3002<\/p>\n<h2 id=\"union-all%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-pfwbUTwrFv\">UNION ALL\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p><code>UNION ALL<\/code>\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u5408\u4f75\u4f86\u81ea\u4e0d\u540c\u8cc7\u6599\u8868\u7684\u5831\u544a\u6578\u64da\u3002<\/li>\n<li>\u5f9e\u591a\u500b\u4f86\u6e90\u6536\u96c6\u76f8\u4f3c\u985e\u578b\u7684\u6578\u64da\u3002<\/li>\n<li>\u5728\u6578\u64da\u5206\u6790\u4e2d\uff0c\u5feb\u901f\u7372\u53d6\u6240\u6709\u76f8\u95dc\u6578\u64da\u4ee5\u9032\u884c\u9032\u4e00\u6b65\u8655\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-pfwbUTwrFv\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528<code>UNION ALL<\/code>\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u6240\u6709\u67e5\u8a62\u7684\u5217\u6578\u5fc5\u9808\u76f8\u540c\uff0c\u4e14\u5c0d\u61c9\u7684\u5217\u985e\u578b\u61c9\u8a72\u517c\u5bb9\u3002<\/li>\n<li>\u67e5\u8a62\u7684\u9806\u5e8f\u6703\u5f71\u97ff\u6700\u7d42\u7d50\u679c\u96c6\u7684\u9806\u5e8f\uff0c\u901a\u5e38\u6703\u6309\u7167\u7b2c\u4e00\u500b\u67e5\u8a62\u7684\u9806\u5e8f\u986f\u793a\u3002<\/li>\n<li>\u5728\u5408\u4f75\u5927\u91cf\u6578\u64da\u6642\uff0c\u61c9\u8003\u616e\u5230\u6027\u80fd\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u8cc7\u6599\u8868\u975e\u5e38\u5927\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-pfwbUTwrFv\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0c<code>UNION ALL<\/code>\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u5730\u5408\u4f75\u591a\u500b\u67e5\u8a62\u7684\u7d50\u679c\u96c6\uff0c\u4e26\u5728\u6027\u80fd\u4e0a\u512a\u65bc<code>UNION<\/code>\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5831\u544a\u9084\u662f\u6578\u64da\u5206\u6790\u4e2d\uff0c<code>UNION ALL<\/code>\u90fd\u80fd\u63d0\u4f9b\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code>VPS<\/code>\u3001<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4UNION ALL\uff0c\u5b78\u7fd2\u5982\u4f55\u5408\u4f75\u591a\u500b\u7d50\u679c\u96c6\uff0c\u4fdd\u7559\u6240\u6709\u91cd\u8907\u6578\u64da\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\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-80128","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80128","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=80128"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80128\/revisions"}],"predecessor-version":[{"id":80129,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80128\/revisions\/80129"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=80128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=80128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=80128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}