{"id":76278,"date":"2024-10-16T05:20:13","date_gmt":"2024-10-15T21:20:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76278\/"},"modified":"2024-10-16T05:20:13","modified_gmt":"2024-10-15T21:20:13","slug":"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8union%e9%81%8b%e7%ae%97%e7%ac%a6%e5%b0%87%e5%85%a9%e5%80%8b%e6%88%96%e5%85%a9%e5%80%8b%e4%bb%a5%e4%b8%8aselect%e8%aa%9e%e5%8f%a5%e7%9a%84%e7%b5%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76278\/","title":{"rendered":"MySQL\u5165\u9580\uff1a\u4f7f\u7528UNION\u904b\u7b97\u7b26\u5c07\u5169\u500b\u6216\u5169\u500b\u4ee5\u4e0aSELECT\u8a9e\u53e5\u7684\u7d50\u679c\u5408\u4f75\u8d77\u4f86\u3002"},"content":{"rendered":"<h1 id=\"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8union%e9%81%8b%e7%ae%97%e7%ac%a6%e5%b0%87%e5%85%a9%e5%80%8b%e6%88%96%e5%85%a9%e5%80%8b%e4%bb%a5%e4%b8%8aselect%e8%aa%9e%e5%8f%a5%e7%9a%84%e7%b5%90-SbjACVBEPF\">MySQL\u5165\u9580\uff1a\u4f7f\u7528UNION\u904b\u7b97\u7b26\u5c07\u5169\u500b\u6216\u5169\u500b\u4ee5\u4e0aSELECT\u8a9e\u53e5\u7684\u7d50\u679c\u5408\u4f75\u8d77\u4f86<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u975e\u5e38\u6d41\u884c\u7684\u9078\u64c7\uff0c\u56e0\u70ba\u5b83\u7684\u9748\u6d3b\u6027\u548c\u5f37\u5927\u7684\u529f\u80fd\u3002\u7576\u6211\u5011\u9700\u8981\u5f9e\u591a\u500b\u8868\u4e2d\u7372\u53d6\u6578\u64da\u6642\uff0cUNION\u904b\u7b97\u7b26\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528UNION\u904b\u7b97\u7b26\u4f86\u5408\u4f75\u5169\u500b\u6216\u591a\u500bSELECT\u8a9e\u53e5\u7684\u7d50\u679c\u3002<\/p>\n<h2 id=\"union%e9%81%8b%e7%ae%97%e7%ac%a6%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-SbjACVBEPF\">UNION\u904b\u7b97\u7b26\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>UNION\u904b\u7b97\u7b26\u7528\u65bc\u5c07\u5169\u500b\u6216\u591a\u500bSELECT\u67e5\u8a62\u7684\u7d50\u679c\u5408\u4f75\u6210\u4e00\u500b\u7d50\u679c\u96c6\u3002\u9019\u4e9b\u67e5\u8a62\u5fc5\u9808\u5177\u6709\u76f8\u540c\u7684\u5217\u6578\uff0c\u4e26\u4e14\u5c0d\u61c9\u7684\u5217\u5fc5\u9808\u5177\u6709\u76f8\u4f3c\u7684\u6578\u64da\u985e\u578b\u3002UNION\u904b\u7b97\u7b26\u6703\u81ea\u52d5\u53bb\u9664\u91cd\u8907\u7684\u884c\uff0c\u82e5\u5e0c\u671b\u4fdd\u7559\u91cd\u8907\u7684\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528UNION ALL\u904b\u7b97\u7b26\u3002<\/p>\n<h2 id=\"union%e7%9a%84%e8%aa%9e%e6%b3%95-SbjACVBEPF\">UNION\u7684\u8a9e\u6cd5<\/h2>\n<pre><code>\nSELECT column1, column2, ...\nFROM table1\nWHERE condition1\nUNION\nSELECT column1, column2, ...\nFROM table2\nWHERE condition2;\n<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0ccolumn1, column2\u7b49\u662f\u8981\u9078\u64c7\u7684\u5217\uff0ctable1\u548ctable2\u662f\u8981\u67e5\u8a62\u7684\u8868\uff0ccondition1\u548ccondition2\u662f\u67e5\u8a62\u7684\u689d\u4ef6\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8union%e7%9a%84%e7%a4%ba%e4%be%8b-SbjACVBEPF\">\u4f7f\u7528UNION\u7684\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<strong>customers<\/strong>\u548c<strong>suppliers<\/strong>\uff0c\u5b83\u5011\u90fd\u6709\u4e00\u500b\u540d\u70ba<strong>city<\/strong>\u7684\u5217\u3002\u6211\u5011\u5e0c\u671b\u7372\u53d6\u6240\u6709\u4f86\u81ea\u9019\u5169\u500b\u8868\u7684\u57ce\u5e02\u540d\u7a31\u3002<\/p>\n<pre><code>\nSELECT city FROM customers\nUNION\nSELECT city FROM suppliers;\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u4f86\u81ea<strong>customers<\/strong>\u548c<strong>suppliers<\/strong>\u8868\u4e2d\u6240\u6709\u4e0d\u540c\u7684\u57ce\u5e02\u540d\u7a31\u3002\u5982\u679c\u6211\u5011\u5e0c\u671b\u4fdd\u7559\u91cd\u8907\u7684\u57ce\u5e02\u540d\u7a31\uff0c\u53ef\u4ee5\u4f7f\u7528UNION ALL\uff1a<\/p>\n<pre><code>\nSELECT city FROM customers\nUNION ALL\nSELECT city FROM suppliers;\n<\/code><\/pre>\n<h2 id=\"union%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-SbjACVBEPF\">UNION\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u6240\u6709SELECT\u8a9e\u53e5\u7684\u5217\u6578\u5fc5\u9808\u76f8\u540c\u3002<\/li>\n<li>\u5c0d\u61c9\u7684\u5217\u5fc5\u9808\u5177\u6709\u76f8\u4f3c\u7684\u6578\u64da\u985e\u578b\u3002<\/li>\n<li>UNION\u904b\u7b97\u7b26\u6703\u81ea\u52d5\u53bb\u9664\u91cd\u8907\u7684\u884c\uff0c\u800cUNION ALL\u5247\u4e0d\u6703\u3002<\/li>\n<li>\u67e5\u8a62\u7684\u9806\u5e8f\u6703\u5f71\u97ff\u6700\u7d42\u7d50\u679c\u96c6\u7684\u9806\u5e8f\uff0c\u901a\u5e38\u53ef\u4ee5\u4f7f\u7528ORDER BY\u4f86\u9032\u884c\u6392\u5e8f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8order-by%e9%80%b2%e8%a1%8c%e6%8e%92%e5%ba%8f-SbjACVBEPF\">\u4f7f\u7528ORDER BY\u9032\u884c\u6392\u5e8f<\/h2>\n<p>\u5982\u679c\u9700\u8981\u5c0d\u5408\u4f75\u5f8c\u7684\u7d50\u679c\u9032\u884c\u6392\u5e8f\uff0c\u53ef\u4ee5\u5728\u6700\u5f8c\u4e00\u500bSELECT\u8a9e\u53e5\u5f8c\u4f7f\u7528ORDER BY\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nSELECT city FROM customers\nUNION\nSELECT city FROM suppliers\nORDER BY city;\n<\/code><\/pre>\n<p>\u9019\u6a23\u5c07\u6703\u6839\u64da\u57ce\u5e02\u540d\u7a31\u5c0d\u6700\u7d42\u7684\u7d50\u679c\u96c6\u9032\u884c\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-SbjACVBEPF\">\u7d50\u8ad6<\/h2>\n<p>UNION\u904b\u7b97\u7b26\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5f9e\u591a\u500b\u8868\u4e2d\u5408\u4f75\u6578\u64da\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528UNION\u548cUNION ALL\uff0c\u60a8\u53ef\u4ee5\u9748\u6d3b\u5730\u7372\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5206\u6790\u9084\u662f\u5831\u544a\u751f\u6210\u4e2d\uff0c\u638c\u63e1\u9019\u4e00\u6280\u8853\u90fd\u5c07\u5927\u5927\u63d0\u9ad8\u60a8\u7684\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6709\u95dc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u7684\u5167\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528MySQL\u4e2d\u7684UNION\u904b\u7b97\u7b26\uff0c\u5c07\u5169\u500b\u6216\u591a\u500bSELECT\u8a9e\u53e5\u7684\u7d50\u679c\u6709\u6548\u5408\u4f75\uff0c\u63d0\u5347\u6578\u64da\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-76278","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76278","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=76278"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76278\/revisions"}],"predecessor-version":[{"id":76279,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76278\/revisions\/76279"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}