1、SQL中Sum()替換Count使用 SELECT COUNT(OnDutyTime) AS 本周入職 FROM dbo.EmployeeMsg WHERE DATEDIFF(WEEK,OnDutyTime,GETDATE())=0 SELECT ISNULL(SUM(1),0) AS 本周入職 ...
1、SQL中Sum()替換Count使用 SELECT COUNT(OnDutyTime) AS 本周入職 FROM dbo.EmployeeMsg WHERE DATEDIFF(WEEK,OnDutyTime,GETDATE())=0 SELECT ISNULL(SUM(1),0) AS 本周入職 ...