{"id":217806,"date":"2023-12-23T00:34:31","date_gmt":"2023-12-22T16:34:31","guid":{"rendered":"https:\/\/www.idc.net\/help\/217806\/"},"modified":"2023-12-23T00:34:31","modified_gmt":"2023-12-22T16:34:31","slug":"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8union%e6%93%8d%e4%bd%9c%e7%ac%a6%e7%bb%93%e5%90%88%e4%b8%a4%e4%b8%aa%e6%88%96%e5%a4%9a%e4%b8%aaselect%e8%af%ad%e5%8f%a5%e7%9a%84","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217806\/","title":{"rendered":"MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528UNION\u64cd\u4f5c\u7b26\u7ed3\u5408\u4e24\u4e2a\u6216\u591a\u4e2aSELECT\u8bed\u53e5\u7684\u7ed3\u679c\u96c6"},"content":{"rendered":"<p><title id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8union%e6%93%8d%e4%bd%9c%e7%ac%a6%e7%bb%93%e5%90%88%e4%b8%a4%e4%b8%aa%e6%88%96%e5%a4%9a%e4%b8%aaselect%e8%af%ad%e5%8f%a5%e7%9a%84-tAgizpNFqs\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528UNION\u64cd\u4f5c\u7b26\u7ed3\u5408\u4e24\u4e2a\u6216\u591a\u4e2aSELECT\u8bed\u53e5\u7684\u7ed3\u679c\u96c6<\/title><\/p>\n<h1 id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8union%e6%93%8d%e4%bd%9c%e7%ac%a6%e7%bb%93%e5%90%88%e4%b8%a4%e4%b8%aa%e6%88%96%e5%a4%9a%e4%b8%aaselect%e8%af%ad%e5%8f%a5%e7%9a%84-tAgizpNFqs\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528UNION\u64cd\u4f5c\u7b26\u7ed3\u5408\u4e24\u4e2a\u6216\u591a\u4e2aSELECT\u8bed\u53e5\u7684\u7ed3\u679c\u96c6<\/h1>\n<p>MySQL\u662f\u4e00\u79cd\u6d41\u884c\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff0c\u5e7f\u6cdb\u7528\u4e8eWeb\u5e94\u7528\u7a0b\u5e8f\u548c\u5176\u4ed6\u6570\u636e\u9a71\u52a8\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u3002\u5728MySQL\u4e2d\uff0cUNION\u64cd\u4f5c\u7b26\u7528\u4e8e\u5c06\u4e24\u4e2a\u6216\u591a\u4e2aSELECT\u8bed\u53e5\u7684\u7ed3\u679c\u96c6\u5408\u5e76\u4e3a\u4e00\u4e2a\u7ed3\u679c\u96c6\u3002<\/p>\n<h2 id=\"union%e6%93%8d%e4%bd%9c%e7%ac%a6%e7%9a%84%e8%af%ad%e6%b3%95-tAgizpNFqs\">UNION\u64cd\u4f5c\u7b26\u7684\u8bed\u6cd5<\/h2>\n<p>UNION\u64cd\u4f5c\u7b26\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ... FROM table1\nUNION\nSELECT column1, column2, ... FROM table2;\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0ccolumn1, column2, ...\u662f\u8981\u9009\u62e9\u7684\u5217\uff0ctable1\u548ctable2\u662f\u8981\u9009\u62e9\u7684\u8868\u3002<\/p>\n<h2 id=\"union%e6%93%8d%e4%bd%9c%e7%ac%a6%e7%9a%84%e7%94%a8%e9%80%94-tAgizpNFqs\">UNION\u64cd\u4f5c\u7b26\u7684\u7528\u9014<\/h2>\n<p>UNION\u64cd\u4f5c\u7b26\u53ef\u4ee5\u7528\u4e8e\u4ee5\u4e0b\u60c5\u51b5\uff1a<\/p>\n<ul>\n<li>\u5408\u5e76\u4e24\u4e2a\u6216\u591a\u4e2a\u8868\u7684\u6570\u636e<\/li>\n<li>\u53bb\u9664\u91cd\u590d\u7684\u884c<\/li>\n<li>\u6309\u7279\u5b9a\u7684\u987a\u5e8f\u6392\u5e8f\u7ed3\u679c\u96c6<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b-tAgizpNFqs\">\u793a\u4f8b<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e24\u4e2a\u8868\uff1aemployees\u548ccustomers\u3002\u6211\u4eec\u60f3\u8981\u5c06\u8fd9\u4e24\u4e2a\u8868\u7684\u6570\u636e\u5408\u5e76\uff0c\u5e76\u6309\u7167\u59d3\u540d\u7684\u5b57\u6bcd\u987a\u5e8f\u6392\u5e8f\u3002<\/p>\n<pre><code>SELECT name FROM employees\nUNION\nSELECT name FROM customers\nORDER BY name;\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u9009\u62e9\u4e86employees\u8868\u548ccustomers\u8868\u7684name\u5217\uff0c\u5e76\u4f7f\u7528UNION\u64cd\u4f5c\u7b26\u5c06\u5b83\u4eec\u5408\u5e76\u4e3a\u4e00\u4e2a\u7ed3\u679c\u96c6\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528ORDER BY\u5b50\u53e5\u6309\u7167\u59d3\u540d\u7684\u5b57\u6bcd\u987a\u5e8f\u5bf9\u7ed3\u679c\u96c6\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9-tAgizpNFqs\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u5728\u4f7f\u7528UNION\u64cd\u4f5c\u7b26\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>UNION\u64cd\u4f5c\u7b26\u53ea\u80fd\u5408\u5e76\u5177\u6709\u76f8\u540c\u5217\u6570\u548c\u76f8\u4f3c\u6570\u636e\u7c7b\u578b\u7684SELECT\u8bed\u53e5\u3002<\/li>\n<li>UNION\u64cd\u4f5c\u7b26\u9ed8\u8ba4\u53bb\u9664\u91cd\u590d\u7684\u884c\uff0c\u5982\u679c\u9700\u8981\u4fdd\u7559\u91cd\u590d\u7684\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528UNION ALL\u64cd\u4f5c\u7b26\u3002<\/li>\n<li>UNION\u64cd\u4f5c\u7b26\u7684\u6027\u80fd\u53ef\u80fd\u8f83\u4f4e\uff0c\u7279\u522b\u662f\u5728\u5408\u5e76\u5927\u91cf\u6570\u636e\u65f6\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5176\u4ed6\u65b9\u6cd5\u6765\u5b9e\u73b0\u76f8\u540c\u7684\u529f\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%80%bb%e7%bb%93-tAgizpNFqs\">\u603b\u7ed3<\/h2>\n<p>UNION\u64cd\u4f5c\u7b26\u662fMySQL\u4e2d\u7528\u4e8e\u5408\u5e76\u4e24\u4e2a\u6216\u591a\u4e2aSELECT\u8bed\u53e5\u7684\u7ed3\u679c\u96c6\u7684\u5f3a\u5927\u5de5\u5177\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u5408\u5e76\u8868\u7684\u6570\u636e\uff0c\u53bb\u9664\u91cd\u590d\u7684\u884c\uff0c\u5e76\u6309\u7279\u5b9a\u7684\u987a\u5e8f\u6392\u5e8f\u7ed3\u679c\u96c6\u3002\u5728\u4f7f\u7528UNION\u64cd\u4f5c\u7b26\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u6570\u636e\u7c7b\u578b\u548c\u6027\u80fd\u65b9\u9762\u7684\u95ee\u9898\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684\u9999\u6e2f\u670d\u52a1\u5668\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9ad8\u6027\u80fd\u7684\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u4ee5\u53ca\u5176\u4ed6\u5730\u533a\u7684\u670d\u52a1\u5668\u9009\u62e9\u3002\u60a8\u53ef\u4ee5\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528UNION\u64cd\u4f5c\u7b26\u7ed3\u5408\u4e24\u4e2a\u6216\u591a\u4e2aSELECT\u8bed\u53e5\u7684\u7ed3\u679c\u96c6 MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528UNI [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217806","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217806","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217806"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217806\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217806"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217806"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217806"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}