用SQL实现取员工日工作量和月工作量

用SQL实现取员工日工作量和月工作量 

SELECT     CONVERT(char(10), 时间, 120) AS 时间, COUNT(1) AS 日工作量

FROM         (SELECT DISTINCT BookID, CreatedDate AS 时间, CreatedByUser AS 姓名

                       FROM        BWK_120BookIn

                       UNION

                       SELECT DISTINCT BookID, CreatedDate, CreatedByUser

                       FROM         BWK_120BookIn ) AS t

GROUP BY CONVERT(char(10), 时间, 120)

ORDER BY 时间

select count(*) as 工作量,datename(MM,Createddate) 月 from bwk_120bookin group by datename(MM,Createddate)

GO