Sql 中按天、周、月、年 进行分组查询

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select sum(未清金额),day(CreateTime) '日' from Home_Comment_t
group by day(CreateTime)
go
select sum(未清金额),month(CreateTime) '月' from Home_Comment_t
group by month(CreateTime)
go
select sum(未清金额),y……

select sum(未清金额),DATEPART(week,CreateTime) '周' from table  
group by DATEPART(week,CreateTime)

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