突然間發現，已經好久沒有寫部落格了，也好久沒用SQLServer進行開發了。由於目前專案開發的原因，對於SQL Server才重視起來。發現SQL Server也引進了不少新的東西，現將一個不錯的動態行列轉換的例子給大家分享一下，行列轉換的函式為：pivot,unpivot
SQL 2008行列轉換的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 ---列名不要重複   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 ('

[email protected]+')   ) as r'   EXEC( @sql)