SQL 循环30日

循环30日的统计

大概格式是

with Date as (
select
    cast(DATEADD(mm, DATEDIFF(mm,0,getdate()), 0)  as datetime)
    Date union all select Date+1
from Date
where Date+1 < CONVERT(CHAR(10),DATEADD(m,1,DATEADD(dd,-DAY(GETDATE())+1,GETDATE())),111)
)
select day(a.Date) as day,
    b.ID,
from Date a
left join (
select * from Table) b on
    year(a.Date) = year(b.DATE)
and month(a.Date) = month(b.DATE)
and day(a.Date) = day(b.DATE);