{"id":170071,"date":"2024-11-06T20:54:18","date_gmt":"2024-11-06T12:54:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/170071\/"},"modified":"2024-11-06T20:54:19","modified_gmt":"2024-11-06T12:54:19","slug":"%e4%bd%a0%e6%98%af%e5%90%a6%e6%87%82%e5%be%97oracle-union-all","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/170071\/","title":{"rendered":"\u4f60\u662f\u5426\u61c2\u5f97Oracle UNION ALL"},"content":{"rendered":"<h1 id=\"%e4%bd%a0%e6%98%af%e5%90%a6%e6%87%82%e5%be%97oracle-union-all-mtIkWXMBod\">\u4f60\u662f\u5426\u61c2\u5f97Oracle UNION ALL<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002Oracle\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u67e5\u8a62\u529f\u80fd\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fUNION ALL\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0eUNION ALL\u7684\u6982\u5ff5\u3001\u7528\u6cd5\u53ca\u5176\u8207UNION\u7684\u5340\u5225\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u91cd\u8981\u7684SQL\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"union-all%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-mtIkWXMBod\">UNION ALL\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>UNION ALL\u662f\u4e00\u500bSQL\u64cd\u4f5c\u7b26\uff0c\u7528\u65bc\u5c07\u5169\u500b\u6216\u591a\u500bSELECT\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u5408\u4f75\u70ba\u4e00\u500b\u7d50\u679c\u96c6\u3002\u8207UNION\u4e0d\u540c\u7684\u662f\uff0cUNION ALL\u4e0d\u6703\u81ea\u52d5\u53bb\u9664\u91cd\u8907\u7684\u8a18\u9304\uff0c\u9019\u610f\u5473\u8457\u5982\u679c\u5728\u4e0d\u540c\u7684\u67e5\u8a62\u4e2d\u6709\u76f8\u540c\u7684\u884c\uff0c\u9019\u4e9b\u884c\u5c07\u6703\u5728\u6700\u7d42\u7684\u7d50\u679c\u96c6\u4e2d\u51fa\u73fe\u591a\u6b21\u3002<\/p>\n<h2 id=\"union-all%e7%9a%84%e8%aa%9e%e6%b3%95-mtIkWXMBod\">UNION ALL\u7684\u8a9e\u6cd5<\/h2>\n<p>UNION ALL\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\uff0ccolumn1, column2\u7b49\u662f\u8981\u9078\u64c7\u7684\u5217\u540d\uff0ctable1\u548ctable2\u662f\u8981\u67e5\u8a62\u7684\u8cc7\u6599\u8868\uff0ccondition1\u548ccondition2\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-mtIkWXMBod\">UNION ALL\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8cc7\u6599\u8868\uff1aemployees\u548ccontractors\uff0c\u5169\u8005\u90fd\u6709\u76f8\u540c\u7684\u7d50\u69cb\uff0c\u5305\u62ecid\u3001name\u548csalary\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528UNION ALL\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT id, name, salary\nFROM employees\nWHERE salary &gt; 50000\nUNION ALL\nSELECT id, name, salary\nFROM contractors\nWHERE salary &gt; 50000;<\/code><\/pre>\n<p>\u9019\u6bb5SQL\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u85aa\u6c34\u8d85\u904e50000\u7684\u54e1\u5de5\u548c\u627f\u5305\u5546\u7684\u8cc7\u6599\uff0c\u4e26\u4e14\u5982\u679c\u6709\u91cd\u8907\u7684\u8a18\u9304\uff0c\u9019\u4e9b\u8a18\u9304\u5c07\u6703\u5728\u7d50\u679c\u4e2d\u986f\u793a\u591a\u6b21\u3002<\/p>\n<h2 id=\"union-all%e8%88%87union%e7%9a%84%e5%8d%80%e5%88%a5-mtIkWXMBod\">UNION ALL\u8207UNION\u7684\u5340\u5225<\/h2>\n<p>UNION\u548cUNION ALL\u7684\u4e3b\u8981\u5340\u5225\u5728\u65bc\u91cd\u8907\u8a18\u9304\u7684\u8655\u7406\u3002UNION\u6703\u81ea\u52d5\u53bb\u9664\u91cd\u8907\u7684\u884c\uff0c\u800cUNION ALL\u5247\u4fdd\u7559\u6240\u6709\u884c\u3002\u9019\u610f\u5473\u8457\u4f7f\u7528UNION ALL\u6642\uff0c\u67e5\u8a62\u7684\u6027\u80fd\u901a\u5e38\u6703\u66f4\u597d\uff0c\u56e0\u70ba\u4e0d\u9700\u8981\u9032\u884c\u91cd\u8907\u884c\u7684\u6aa2\u67e5\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u8003\u616e\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT id, name\nFROM employees\nUNION\nSELECT id, name\nFROM contractors;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u54e1\u5de5\u548c\u627f\u5305\u5546\u7684\u552f\u4e00\u8a18\u9304\uff0c\u800c\u4e0d\u6703\u986f\u793a\u91cd\u8907\u7684id\u548cname\u7d44\u5408\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8union-all%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-mtIkWXMBod\">\u4f7f\u7528UNION ALL\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u5217\u6578\u548c\u6578\u64da\u985e\u578b\u5fc5\u9808\u5339\u914d\uff1a<\/strong>\u5728\u4f7f\u7528UNION ALL\u6642\uff0c\u6240\u6709SELECT\u67e5\u8a62\u7684\u5217\u6578\u5fc5\u9808\u76f8\u540c\uff0c\u4e14\u5c0d\u61c9\u5217\u7684\u6578\u64da\u985e\u578b\u4e5f\u5fc5\u9808\u517c\u5bb9\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u7531\u65bcUNION ALL\u4e0d\u9032\u884c\u91cd\u8907\u6aa2\u67e5\uff0c\u56e0\u6b64\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u6027\u80fd\u901a\u5e38\u6703\u512a\u65bcUNION\u3002<\/li>\n<li><strong>\u9069\u7528\u5834\u666f\uff1a<\/strong>\u7576\u4f60\u78ba\u5b9a\u67e5\u8a62\u7d50\u679c\u4e2d\u4e0d\u6703\u6709\u91cd\u8907\u8a18\u9304\uff0c\u6216\u8005\u5e0c\u671b\u4fdd\u7559\u6240\u6709\u8a18\u9304\u6642\uff0c\u4f7f\u7528UNION ALL\u662f\u5408\u9069\u7684\u9078\u64c7\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-mtIkWXMBod\">\u7e3d\u7d50<\/h2>\n<p>UNION ALL\u662f\u4e00\u500b\u5f37\u5927\u7684SQL\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u5730\u5408\u4f75\u591a\u500b\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u3002\u4e86\u89e3\u5176\u7528\u6cd5\u53ca\u8207UNION\u7684\u5340\u5225\uff0c\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8cc7\u6599\u5eab\u64cd\u4f5c\u4e2d\u505a\u51fa\u66f4\u660e\u667a\u7684\u9078\u64c7\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u8655\u7406\u6578\u64da\u7684\u61c9\u7528\u5834\u666f\uff0c\u9078\u64c7\u5408\u9069\u7684\u67e5\u8a62\u65b9\u5f0f\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u4f60\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle UNION ALL\u7684\u7528\u6cd5\uff0c\u5b66\u4e60\u5982\u4f55\u5408\u5e76\u591a\u4e2a\u67e5\u8be2\u7ed3\u679c\uff0c\u4fdd\u7559\u91cd\u590d\u8bb0\u5f55\uff0c\u63d0\u5347\u6570\u636e\u5904\u7406\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-170071","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170071","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=170071"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170071\/revisions"}],"predecessor-version":[{"id":170072,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170071\/revisions\/170072"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=170071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=170071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=170071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}