{"id":627,"date":"2010-10-01T08:30:37","date_gmt":"2010-10-01T08:30:37","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=627"},"modified":"2010-10-01T08:30:37","modified_gmt":"2010-10-01T08:30:37","slug":"union-%e5%92%8cunion-all-%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2010\/10\/01\/union-%e5%92%8cunion-all-%e7%9a%84%e5%8c%ba%e5%88%ab\/","title":{"rendered":"UNION \u548cUNION ALL \u7684\u533a\u522b"},"content":{"rendered":"<p> \u5728\u6570\u636e\u5e93\u4e2d\uff0cUNION\u548cUNION ALL\u5173\u952e\u5b57\u90fd\u662f\u5c06\u4e24\u4e2a\u7ed3\u679c\u96c6\u5408\u5e76\u4e3a\u4e00\u4e2a\uff0c\u4f46\u8fd9\u4e24\u8005\u4ece\u4f7f\u7528\u548c\u6548\u7387\u4e0a\u6765\u8bf4\u90fd\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<p>UNION\u5728\u8fdb\u884c\u8868\u94fe\u63a5\u540e\u4f1a\u7b5b\u9009\u6389\u91cd\u590d\u7684\u8bb0\u5f55\uff0c\u6240\u4ee5\u5728\u8868\u94fe\u63a5\u540e\u4f1a\u5bf9\u6240\u4ea7\u751f\u7684\u7ed3\u679c\u96c6\u8fdb\u884c\u6392\u5e8f\u8fd0\u7b97\uff0c\u5220\u9664\u91cd\u590d\u7684\u8bb0\u5f55\u518d\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n<p>\u5b9e\u9645\u5927\u90e8\u5206\u5e94\u7528\u4e2d\u662f\u4e0d\u4f1a\u4ea7\u751f\u91cd\u590d\u7684\u8bb0\u5f55\uff0c\u6700\u5e38\u89c1\u7684\u662f\u8fc7\u7a0b\u8868\u4e0e\u5386\u53f2\u8868UNION\u3002\u5982\uff1a<\/p>\n<p>select * from gc_dfys<\/p>\n<p>union<\/p>\n<p>select * from ls_jg_dfys<\/p>\n<p>\u8fd9\u4e2aSQL\u5728\u8fd0\u884c\u65f6\u5148\u53d6\u51fa\u4e24\u4e2a\u8868\u7684\u7ed3\u679c\uff0c\u518d\u7528\u6392\u5e8f\u7a7a\u95f4\u8fdb\u884c\u6392\u5e8f\u5220\u9664\u91cd\u590d\u7684\u8bb0\u5f55\uff0c\u6700\u540e\u8fd4\u56de\u7ed3\u679c\u96c6\uff0c\u5982\u679c\u8868\u6570\u636e\u91cf\u5927\u7684\u8bdd\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7528\u78c1\u76d8\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n<p>\u800cUNION ALL\u53ea\u662f\u7b80\u5355\u7684\u5c06\u4e24\u4e2a\u7ed3\u679c\u5408\u5e76\u540e\u5c31\u8fd4\u56de\u3002\u8fd9\u6837\uff0c\u5982\u679c\u8fd4\u56de\u7684\u4e24\u4e2a\u7ed3\u679c\u96c6\u4e2d\u6709\u91cd\u590d\u7684\u6570\u636e\uff0c\u90a3\u4e48\u8fd4\u56de\u7684\u7ed3\u679c\u96c6\u5c31\u4f1a\u5305\u542b\u91cd\u590d\u7684\u6570\u636e\u4e86\u3002<\/p>\n<p>\u4ece\u6548\u7387\u4e0a\u8bf4\uff0cUNION ALL \u8981\u6bd4UNION\u5feb\u5f88\u591a\uff0c\u6240\u4ee5\uff0c\u5982\u679c\u53ef\u4ee5\u786e\u8ba4\u5408\u5e76\u7684\u4e24\u4e2a\u7ed3\u679c\u96c6\u4e2d\u4e0d\u5305\u542b\u91cd\u590d\u7684\u6570\u636e\u7684\u8bdd\uff0c\u90a3\u4e48\u5c31\u4f7f\u7528UNION ALL\uff0c\u5982\u4e0b\uff1a<\/p>\n<p>select * from gc_dfys<\/p>\n<p>union all<\/p>\n<p>select * from ls_jg_dfys <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u6570\u636e\u5e93\u4e2d\uff0cUNION\u548cUNION ALL\u5173\u952e\u5b57\u90fd\u662f\u5c06\u4e24\u4e2a\u7ed3\u679c\u96c6\u5408\u5e76\u4e3a\u4e00\u4e2a\uff0c\u4f46\u8fd9\u4e24\u8005\u4ece\u4f7f\u7528\u548c\u6548\u7387\u4e0a\u6765\u8bf4\u90fd\u6709\u6240\u4e0d [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-627","post","type-post","status-publish","format-standard","hentry","category-sql-server"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/627","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=627"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/627\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}