{"id":1652,"date":"2011-03-30T00:35:23","date_gmt":"2011-03-30T00:35:23","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=1652"},"modified":"2011-03-30T00:40:54","modified_gmt":"2011-03-30T00:40:54","slug":"distinct%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2011\/03\/30\/distinct%e7%9a%84%e4%bd%bf%e7%94%a8\/","title":{"rendered":"Distinct\u7684\u4f7f\u7528"},"content":{"rendered":"<pre escaped=\"true\" lang=\"tsql\">\r\nDistinct\u4e0d\u4ec5\u53ef\u7528\u5728SELECT\u4e2d\uff0c\u4e5f\u53ef\u7528\u5728COUNT\u5185\r\n\u5982\uff1a\u67e5\u8be2\u51fa\u6240\u6709\u5728\u4e00\u7ebf\u3001\u4e8c\u7ebf\u90e8\u95e8\u90fd\u51fa\u8fc7\u5355\u7684\u5ba2\u6237\r\n\u65b9\u6cd5\uff1a\u6309\u5ba2\u6237ID\u5206\u7ec4\uff0c\u5bf9\u6210\u5355\u7684\u90e8\u95e8\u8fdb\u884cDISTINCT,\u6b21\u6570\u5927\u4e8e2\u7684\u5373\u662f\r\nSELECT a.CustomerID\r\nFROM bdOrder a(NOLOCK)\r\nJOIN frmuser f ON a.SalesStaff = f.Account\r\nJOIN mdDepartment md ON f.DepartmentId = md.ID\r\nWHERE md.DepartType IN('first','second')\r\nAND a.OrderDate &gt;='2011-01-01'\r\nGROUP BY a.CustomerID\r\nHAVING COUNT(DISTINCT md.DepartType) &gt;=2<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Distinct\u4e0d\u4ec5\u53ef\u7528\u5728SELECT\u4e2d\uff0c\u4e5f\u53ef\u7528\u5728COUNT\u5185 \u5982\uff1a\u67e5\u8be2\u51fa\u6240\u6709\u5728\u4e00\u7ebf\u3001\u4e8c\u7ebf\u90e8\u95e8\u90fd\u51fa\u8fc7\u5355\u7684\u5ba2\u6237  [&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-1652","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\/1652","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=1652"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/1652\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=1652"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=1652"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=1652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}