{"id":575,"date":"2010-10-01T07:36:15","date_gmt":"2010-10-01T07:36:15","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=575"},"modified":"2010-10-01T07:36:15","modified_gmt":"2010-10-01T07:36:15","slug":"sql%e8%af%ad%e5%8f%a5%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2010\/10\/01\/sql%e8%af%ad%e5%8f%a5%e4%bc%98%e5%8c%96\/","title":{"rendered":"SQL\u8bed\u53e5\u4f18\u5316"},"content":{"rendered":"<p> 1\uff0c\u7528EXISTS\u66ff\u4ee3IN\u3001\u7528NOT EXISTS\u66ff\u4ee3NOT IN;<br \/>\nin\u7684\u903b\u8f91\u548c or\u662f\u76f8\u540c\u7684\uff0c\u67e5\u8be2\u65f6\u5fc5\u987b\u627e\u5230\u6240\u6709\u7b26\u5408\u7684\u8bb0\u5f55\u3002<\/p>\n<p>\u4f46exists\u5219\u4e0d\u540c\uff0c\u4ed6\u662f\u5b58\u5728\u7684\u903b\u8f91\uff0c\u4e5f\u5c31\u662f\u627e\u5230\u6709\u4e00\u4e2a\u5c31\u53ef\u4ee5\u4e86<br \/>\nSELECT * FROM bdOrder<br \/>\nWHERE customid in (  select id form bmdCustomer )  \/\/\u5b50\u67e5\u8be2\u4f1a\u68c0\u67e5\u6bcf\u4e00\u6761\u8bb0\u5f55<\/p>\n<p>SELECT * FROM bdOrder a<br \/>\nWHERE EXISTS<br \/>\n    ( SELECT 1 FROM bmdCustomer b WHERE b.id = a.customerid  ) \/\/\u68c0\u67e5\u5230\u5b58\u5728\u7684\u8bb0\u5f55\u5c31\u8fd4\u56de<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\uff0c\u7528EXISTS\u66ff\u4ee3IN\u3001\u7528NOT EXISTS\u66ff\u4ee3NOT IN; in\u7684\u903b\u8f91\u548c or\u662f\u76f8\u540c\u7684\uff0c\u67e5\u8be2\u65f6\u5fc5\u987b\u627e [&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-575","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\/575","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=575"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/575\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=575"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}