本文介绍了在不使用 CTE 的情况下在结果集中按列获取分组的处理方法,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
这是以下查询
select CAST(DepositeDate AS DATE) as DepositeDate,SUM(TotalAmount) as Amount
from Payment
group by DepositeDate
我得到以下结果.
DepositeDate | Amount |
2021-04-30 | 50 |
2021-04-30 | 50 |
2021-04-26 | 75 |
2021-04-11 | 30 |
2021-04-11 | 30 |
但我需要以下结果
DepositeDate | Amount |
2021-04-30 | 100 |
2021-04-26 | 75 |
2021-04-11 | 60 |
这可以不使用 CTE 吗?
Is this possible without using CTE?
推荐答案
显然,您的 DepositeDate
列有一个时间组件.重复GROUP BY
中的表达式:
Apparently, your DepositeDate
column has a time component. Repeat the expression in the GROUP BY
:
select CAST(DepositeDate AS DATE) as DepositeDate,
SUM(TotalAmount) as Amount
from Payment
group by CAST(DepositeDate AS DATE)
order by CAST(DepositeDate AS DATE);
SQL Server 无法识别 GROUP BY
中的别名.所以 DepositeDate
总是会引用在 FROM
子句中定义的列,而不是 select
中的表达式.
SQL Server does not recognize aliases in the GROUP BY
. So DepositeDate
is always going to refer to a column defined in the FROM
clause and not the expression in the select
.
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