Access and SQL Server 中的表转置

时间：2014-08-12 21:23:45 收藏：0 阅读：277

　　样表如下：

**Student**
ID	sName	Subject	Score
1	张三	Chinese	80
2	张三	Math	90
3	张三	English	85
4	李四	Chinese	85
5	李四	Math	92
6	李四	English	82

Access：

TRANSFORM Avg(Student.Score) AS ScoreOfAvg
SELECT Student.sName
FROM Student
GROUP BY Student.sName
PIVOT Student.Subject;

SQL Server:　　

Select sName,
Avg(case when Subject=‘Chinese‘ then Score end) As ‘Chinese‘,
Avg(case when Subject=‘English‘ then Score end) As ‘English‘,
Avg(case when Subject=‘Math‘ then Score end) As ‘Math‘
From Student
Group By sName


sName	Chinese	English	Math
李四	85	82	92
张三	80	85	90

升级版：

declare @s varchar(8000),@l varchar(8000)
Set @s=‘‘
Select @s=@s +‘, Avg(case Subject when ‘‘‘+ Subject+‘‘‘ then Score else 0 end) As [‘+Subject+‘]‘ From Student Group By Subject
Set @l=‘Select sName‘ +@s+‘From Student Group By sName ORDER BY sName‘
Exec (@l)

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