我写了这样的查询
CASE
WHEN [col1] = 's' THEN '1'
WHEN [col1] = 't' THEN '2'
WHEN [col1] = 'u' THEN '3'
WHEN [col2] = 'v' THEN '4'
.......
END AS product,SUM(col3)
FROM dbo.TableA
我想在产品上分组？
怎么做？
解决方法
@H_502_10@ 您需要做的是为别名的CASE列使用子查询.将查询作为子查询,您可以按别名列进行分组.select product
from
(
select
CASE
WHEN [col1] = 's' THEN '1'
WHEN [col1] = 't' THEN '2'
WHEN [col1] = 'u' THEN '3'
WHEN [col2] = 'v' THEN '4'
END AS product,SUM(col3) as Col3Sum
FROM dbo.TableA
) a
group by product
