我可以计算出SQL Server中两个日期之间有多少个周末吗？

这应该工作：

DECLARE @StartDate DATETIMEDECLARE @EndDate DATETIMESET @StartDate = '2012/11/01'SET @EndDate = '2012/11/05'SELECT  (DATEDIFF(wk, @StartDate, @EndDate) * 2)   +(CASE WHEN DATENAME(dw, @StartDate) = 'Sunday'   THEN 1 ELSE 0 END)   +(CASE WHEN DATENAME(dw, @EndDate)   = 'Saturday' THEN 1 ELSE 0 END)

http://sqlfiddle.com/#!3/d41d8/5707/0