SQLServer行转列

最近面试遇到了一道面试题，顿时有点迷糊，只说出了思路，后来百度了一下，整理了一下思路，于是记录下来，方便以后学习。（面试题请参见附件）

相关的数据表：

1.score表

2.[User]表

sql语句如下：

--方法一：静态sql
SELECT * FROM
(SELECT UID,Name,score,scoreName FROM score,[User] WHERE score.UID=[User].ID) AS SourceTable
PIVOT(AVG(score)FOR scoreName IN ([英语],[数学])) AS a

--方法二：动态sql
DECLARE @s NVARCHAR(4000)  
SELECT @s = ISNULL(@s + ',','') +  QUOTENAME(scoreName)  
FROM  (select distinct scoreName from score) as A ---列名不要重复  

Declare @sql NVARCHAR(4000)  
SET @sql='  
 select r.* from  
(select UID,scoreName,score from score,[User] where score.UID=[User].ID) as t  
pivot  
(  
max(t.score)  
for t.scoreName in ('+@s+')  
) as r'  
EXEC( @sql)

--方法三：Case When select     row_number() OVER(ORDER BY [User].ID) as 编号,  UID as 用户编号,  Name as 姓名,  max(case scoreName when '英语' then score else 0 end) 英语,  max(case scoreName when '数学' then score else 0 end) 数学 from score,[User] WHERE score.UID=[User].ID group by UID,[User].ID,Name