两种比较特殊的交叉数据报表处理
--示例数据:
Create TABLE tb(ID varchar(10),NGNO char(1),QTY int)
Insert tb Select '200505','A',10
UNION ALL Select '200505','B',20
UNION ALL Select '200505','C',30
UNION ALL Select '200506','B',10
UNION ALL Select '200506','C',20
UNION ALL Select '200506','D',30
UNION ALL Select '200506','E',40
GO
交叉数据报表要求1:
按ID列分组,将NGNO列水平显示为多列,但每列由NGNO的大小顺序决定,而不是由NGNO的值决定,对于示例数据,最终的结果要求如下:
ID col1 col2 col3 col4
---------- ------- ------- ------- -------
200505 A(10) B(20) C(30)
200506 B(10) C(20) D(30) E(40)
--实现代码
DECLARE @i varchar(10),@s nvarchar(4000)
Select TOP 1 @s='',@I=COUNT(*) FROM tb
GROUP BY ID
orDER BY COUNT(*) DESC
WHILE @i>0
Select @s=N',col'+@i
+N'=ISNULL(MAX(CASE GID WHEN '+@i
+N' THEN QTY END),'''')'+@s,
@i=@i-1
EXEC(N'Select ID'+@s+N'
FROM(
Select ID,QTY=RTRIM(NGNO)+QUOTENAME(QTY,N''()''),
GID=(Select COUNT(DISTINCT NGNO) FROM TB Where ID=a.ID AND NGNO<=a.NGNO)
FROM tb a
)a GROUP BY ID')