sql - 通过sql查询将年份和月份添加到组中

Question

我有以下查询，其中 @BeginTime 是该月的第一天，@EndTime 是该月的最后一天。

SET @BeginTime = RTRIM(@BeginTime) + ' 00:00:00'
SET @EndTime   = RTRIM(@EndTime) + ' 23:59:59'

select C.Name , COUNT(DISTINCT D.Id)  from DriverLic D 
INNER JOIN Clov C WITH (NOLOCK) ON D.CId = C.CId 

AND ((D.RDate < @EndTime) 
AND ( D.UrDate > @BeginTime))

group by C.Name

我得到这样的输出：

Name  Count(D.Id)
AC        22
AB        32
CD        11

我想得到这样的输出：

Year Month Name Count(D.id)
2013  8     AC      22
2013  8     AB      32
2013  8     CD      11

有没有办法我可以做到这一点？

Answer 1

是的，

SELECT Year(yourDateColumn) AS 'Year', Month(yourDateColumn) AS 'Month', C.Name, COUNT(DISTINCT D.Id)  
from DriverLic D 
    INNER JOIN Clov C WITH (NOLOCK) ON D.CId = C.CId 
--WHERE your where conditions should go here...
GROUP BY 
    Year(yourDateColumn), Month(yourDateColumn), C.Name