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按SQL中的计算字段分组,
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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?
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
原文链接:https://www.f2er.com/mssql/77636.html