T-SQL查询两个日期之间的休息日（周六周日）天数

SELECT COUNT(*) FROM MASTER..SPT_VALUESWHERE TYPE = 'P'AND DATEADD(DAY,NUMBER,'2014-03-13')<='2014-03-26'AND DATEPART(WEEKDAY,DATEADD(DAY,NUMBER,'2014-03-13')) IN (6,7)