标签：des style blog http color ar os 使用 for
--患者接触记录信息,一个患者可以有N个不同的接触记录,每个接触记录又有N个接触类型记录 IF OBJECT_ID (‘dbo.TEST‘) IS NOT NULL DROP TABLE dbo.TEST GO CREATE TABLE dbo.TEST ( ID INT IDENTITY (1000,1) NOT NULL, cid INT,--接触记录号 REMARK VARCHAR (4000), CONTACTTYPE VARCHAR (20), DESCRIBE VARCHAR (4000), ADDDATE DATETIME ) GO --测试数据,包含重复类型 INSERT INTO dbo.TEST (cid, REMARK, CONTACTTYPE, DESCRIBE, ADDDATE) VALUES (81667,‘咨询备注‘,‘ContactType_1‘, NULL,‘2014-06-03 09:53:24‘) ,(81667,‘回访备注‘,‘ContactType_2‘, NULL,‘2014-06-03 09:53:24‘) ,(81667,‘咨询备注‘,‘ContactType_1‘, NULL,‘2014-06-03 09:53:24.92‘) ,(81667,‘回访备注‘,‘ContactType_2‘,‘回访找棕‘,‘2014-06-03 09:53:24.927‘) ,(81667,‘随访备注‘,‘ContactType_3‘,‘随访详情‘,‘2014-06-03 09:53:24.933‘) ,(81667,‘通知备注‘,‘ContactType_4‘,‘通知内容描述‘,‘2014-06-03 09:53:24.94‘) ,(81667,‘预约备注‘,‘ContactType_5‘,‘预约内容‘,‘2014-06-03 09:53:24.947‘) ,(81667,‘回复备注‘,‘ContactType_6‘,‘回复测试。。。。‘,‘2014-06-03 09:53:24.95‘) ,(81679,‘咨询备注‘,‘ContactType_1‘, NULL,‘2014-06-03 10:53:53.743‘) ,(81679,‘回访备注‘,‘ContactType_2‘,‘回访内容描述‘,‘2014-06-03 10:53:53.75‘) ,(81679,‘随访备注‘,‘ContactType_3‘,‘随访详情‘,‘2014-06-03 10:53:53.757‘) ,(81679,‘通知备注‘,‘ContactType_4‘,‘通知内容描述‘,‘2014-06-03 10:53:53.763‘) ,(81679,‘预约备注‘,‘ContactType_5‘,‘预约内容‘,‘2014-06-03 10:53:53.767‘) ,(81679,‘回复备注‘,‘ContactType_6‘,‘回复内容‘,‘2014-06-03 10:53:53.777‘)
--之前的sql方法，有可以会返回相同的类型则 DECLARE @SNvarchar(2000) SET @S=‘‘ SELECT @S=@S+‘/‘+(CASE ContactType WHEN ‘ContactType_1‘THEN ‘咨询‘ WHEN ‘ContactType_2‘THEN ‘回访‘ WHEN ‘ContactType_3‘THEN ‘随访‘ WHEN ‘ContactType_4‘THEN ‘通知‘ WHEN ‘ContactType_5‘THEN ‘预约‘ WHEN ‘ContactType_6‘THEN ‘回复‘ END) FROM test WHERE CID=81667 PRINT @s
--新的Sql方法，通过FOR XML PATH和DISTINCT进行去重处理 DECLARE @SNvarchar(2000) --无法在包含DISTINCT关键字的查询中将结果赋予变量,以下Sql将出现错误"关键字 ‘DISTINCT‘ 附近有语法错误。 Severity 15" -- SELECT @s= DISTINCT -- ( ‘/‘+(CASE ContactType -- WHEN ‘ContactType_1‘THEN ‘咨询‘ -- WHEN ‘ContactType_2‘THEN ‘回访‘ -- WHEN ‘ContactType_3‘THEN ‘随访‘ -- WHEN ‘ContactType_4‘THEN ‘通知‘ -- WHEN ‘ContactType_5‘THEN ‘预约‘ -- WHEN ‘ContactType_6‘THEN ‘回复‘ -- END) -- ) -- FROM test WHERE Cid=81667 -- FOR XML PATH(‘‘) SELECT @S=( SELECT DISTINCT ( ‘/‘+(CASE ContactType WHEN ‘ContactType_1‘THEN ‘咨询‘ WHEN ‘ContactType_2‘THEN ‘回访‘ WHEN ‘ContactType_3‘THEN ‘随访‘ WHEN ‘ContactType_4‘THEN ‘通知‘ WHEN ‘ContactType_5‘THEN ‘预约‘ WHEN ‘ContactType_6‘THEN ‘回复‘ END) ) FROM test WHERE Cid=81667 FOR XML PATH(‘‘) ) PRINT @s
使用SQL SERVER FOR XML PATH将多个结果集转换成一行并进行去重处理
标签：des style blog http color ar os 使用 for
原文地址：http://www.cnblogs.com/huangtailang/p/4077168.html
