本文介绍了SQL server 在多列上的 Pivot的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
I am trying to pivot on multiple columns. I am using SQL server 2008. Here is what I have tried so far
CREATE TABLE #t ( id int, Rscd varchar(10),Accd varchar(10),position int)
INSERT INTO #t Values (10,'A','B',1)
INSERT INTO #t Values (10,'C','D',2)
Select id,[1],[2],[11],[12] FROM
(SELECT id, Rscd,Accd, position , position +10 as Aposition
From #t)
As query
PIVOT (MAX(Rscd )
FOR Position IN ([1],[2])) AS Pivot1
PIVOT (MAX(Accd )
FOR Aposition IN ([11],[12])) AS Pivot2
The below indicated is the result that I am getting
id 1 2 11 12
10 NULL C NULL D
10 A NULL B NULL
But the result that I am trying to achieve is ,
id 1 2 11 12
10 A C B D
Any help ? what is wrong in my code.
解决方案
I would unpivot the columns into pairs first, then pivot them. Basically the unpivot process will convert the pairs of columns (rscd
, position
and accd
, aposition
) into rows, then you can apply the pivot. The code will be:
select id, [1], [2], [11], [12]
from
(
select id, col, value
from #t
cross apply
(
select rscd, position union all
select Accd, position + 10
) c (value, col)
) d
pivot
(
max(value)
for col in ([1], [2], [11], [12])
) piv;
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