[轉]SQLSERVER行列转换的pivot

SQL 2008行列转换的pivot 

[sql]

IF OBJECT_ID('tempdb..#ABC') IS NOT NULL 

DROP TABLE #ABC 

 

create table #ABC 

( 

ID  INT 

,UserID BIGINT   

,UserExamID INT  

,TestPaperID INT     

,QuestionID INT 

,AnswerID   INT 

,Ctime DATETIME 

) 

INSERT INTO #ABC 

SELECT 1,120629210042331600,1,3,22,49,GETDATE() UNION ALL 

SELECT 2,120629210042331600,1,3,23,51,GETDATE() UNION ALL 

SELECT 3,120629210042331600,1,3,24,56,GETDATE() UNION ALL 

SELECT 4,120629210042331600,1,3,25,62,GETDATE() UNION ALL 

SELECT 5,120629210042331600,1,3,26,66,GETDATE() UNION ALL 

SELECT 6,120629210042331600,1,3,27,72,GETDATE() UNION ALL 

SELECT 7,120629210042331600,1,3,28,77,GETDATE() UNION ALL 

SELECT 8,120629210042331600,1,3,29,81,GETDATE() UNION ALL 

SELECT 9,120629210042331600,1,3,30,86,GETDATE() UNION ALL 

SELECT 10,120629210042331600,1,3,31,90,GETDATE() UNION ALL

SELECT 1,120629210011732588,1,3,22,49,GETDATE() UNION ALL 

SELECT 2,120629210011732588,1,3,23,51,GETDATE() UNION ALL 

SELECT 3,120629210011732588,1,3,24,56,GETDATE() UNION ALL 

SELECT 4,120629210011732588,1,3,25,62,GETDATE() UNION ALL 

SELECT 5,120629210011732588,1,3,26,66,GETDATE() UNION ALL 

SELECT 6,120629210011732588,1,3,27,72,GETDATE() UNION ALL 

SELECT 7,120629210011732588,1,3,28,77,GETDATE() UNION ALL 

SELECT 8,120629210011732588,1,3,29,81,GETDATE() UNION ALL 

SELECT 9,120629210011732588,1,3,30,86,GETDATE() UNION ALL 

SELECT 10,120629210011732588,1,3,31,90,GETDATE()   

 

SELECT * FROM #ABC 

 

[sql]

DECLARE @s NVARCHAR(4000) 

SELECT @s = ISNULL(@s + ',', '') +  QUOTENAME(QuestionID) 

FROM (select distinct QuestionID from #ABC) as A ---列名不要重复

 

Declare @sql NVARCHAR(4000) 

SET @sql=' 

select r.* from 

(select UserID,QuestionID,AnswerID from #ABC) as t 

pivot 

( 

max(t.AnswerID) 

for t.QuestionID in ('+@s+') 

) as r' 

  

EXEC( @sql)