sql 指定时间 所在的周、月、季、年

DECLARE @TodayDateTime DATETIME
DECLARE @strToday NVARCHAR(19)

DECLARE @TodayBeginDateTime DATETIME
DECLARE @TodayEndDateTime DATETIME

DECLARE @WeekBeginDateTime DATETIME
DECLARE @WeekEndDateTime DATETIME

DECLARE @MonthBeginDateTime DATETIME
DECLARE @MonthEndDateTime DATETIME

DECLARE @YearBeginDateTime DATETIME
DECLARE @YearEndDateTime DATETIME

DECLARE @QuarterBeginDateTime DATETIME
DECLARE @QuarterEndDateTime DATETIME

DECLARE @YesterdayBeginDateTime DATETIME
DECLARE @YesterdayEndDateTime DATETIME

DECLARE @Day3BeforeBeginDateTime DATETIME
DECLARE @Day3BeforeEndDateTime DATETIME

DECLARE @Day7BeforeBeginDateTime DATETIME
DECLARE @Day7BeforeEndDateTime DATETIME

DECLARE @Day14BeforeBeginDateTime DATETIME
DECLARE @Day14BeforeEndDateTime DATETIME

DECLARE @Day30BeforeBeginDateTime DATETIME
DECLARE @Day30BeforeEndDateTime DATETIME

DECLARE @LastMonthBeginDateTime DATETIME
DECLARE @LastMonthEndDateTime DATETIME

DECLARE @LastWeekBeginDateTime DATETIME
DECLARE @LastWeekEndDateTime DATETIME

DECLARE @DateID INT

--指定统计时间
SET @TodayDateTime=GETDATE()-1 --CAST('2011-03-23 00:00:00' AS DATETIME)
SET @strToday= CONVERT(NVARCHAR(19),GETDATE(),120)
--当日
SET @TodayBeginDateTime=DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),0)
SET @TodayEndDateTime=DATEADD(ms, -3, DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),1))
--本月的第一天和最后一天
SET @MonthBeginDateTime=DATEADD(mm, DATEDIFF(mm,0,@TodayDateTime), 0)
SET @MonthEndDateTime=DATEADD(ms, -3, DATEADD(mm, DATEDIFF(m, 0, @TodayDateTime)+1, 0))
--本年的第一天和最后一天
SET @YearBeginDateTime=DATEADD(yy, DATEDIFF(yy,0,@TodayDateTime), 0)
SET @YearEndDateTime=dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,@TodayDateTime)+1, 0))

--本周的第一天和最后一天(第一天是星期一 。因为系统默认的星期日是一周的第一天，所以计算时应该在 指定的时间上减一天)
SET @WeekBeginDateTime = DATEADD(wk, DATEDIFF(wk,0,@TodayDateTime), 0)
SET @WeekEndDateTime = DATEADD(ms, -3, DATEADD(wk, DATEDIFF(wk,0, @TodayDateTime), 7))

--本季的度第一天和最后一天
SET @QuarterBeginDateTime=DATEADD(qq, DATEDIFF(qq, 0, @TodayDateTime), 0)
SET @QuarterEndDateTime= DATEADD(ms, -3, DATEADD(qq, DATEDIFF(qq, 0, @TodayDateTime)+1, 0))
--昨天
SET @YesterdayBeginDateTime=DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-1)
SET @YesterdayEndDateTime=DATEADD(ms, -3, DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),0))
--三天前
SET @Day3BeforeBeginDateTime=DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-3)
SET @Day3BeforeEndDateTime=DATEADD(ms, -3, DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-2))
-- 七天前
SET @Day7BeforeBeginDateTime=DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-7)
SET @Day7BeforeEndDateTime=DATEADD(ms, -3, DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-6))
-- 14天前
SET @Day14BeforeBeginDateTime=DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-14)
SET @Day14BeforeEndDateTime=DATEADD(ms, -3, DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-13))
-- 30天前
SET @Day30BeforeBeginDateTime=DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-30)
SET @Day30BeforeEndDateTime=DATEADD(ms, -3, DATEADD(dd, DATEDIFF(dd,0,@TodayDateTime),-29))

--上个月的第一天和最后一天
SET @LastMonthBeginDateTime= DATEADD(mm, DATEDIFF(mm, 0, DATEADD(ms,-3,DATEADD(mm, DATEDIFF(mm,0,@TodayDateTime), 0))), 0)
SET @LastMonthEndDateTime= DATEADD(ms,-3,DATEADD(mm, DATEDIFF(mm,0,@TodayDateTime), 0))
--上周第一天和最后一天(第一天是星期一)
SET @LastWeekBeginDateTime = DATEADD(dd, -1, DATEADD(wk,DATEDIFF(wk, 6, @TodayDateTime), 1))
SET @LastWeekEndDateTime = DATEADD(ms, -3, DATEADD(dd,0,DATEADD(wk,DATEDIFF(wk,6,@TodayDateTime),7)))

SET @DateID=CAST(CONVERT(CHAR(10), @TodayDateTime, 112) AS INT)

/*--核对统计时间 */
SELECT @TodayDateTime AS TodayDateTime
, @TodayBeginDateTime AS TodayBeginDateTime, @TodayEndDateTime AS TodayEndDateTime
, @MonthBeginDateTime AS MonthBeginDateTime, @MonthEndDateTime AS MonthEndDateTime
, @YearBeginDateTime AS YearBeginDateTime, @YearEndDateTime AS YearEndDateTime
, @WeekBeginDateTime AS WeekBeginDateTime, @WeekEndDateTime AS WeekEndDateTime
, @QuarterBeginDateTime AS QuarterBeginDateTime, @QuarterEndDateTime AS QuarterEndDateTime
, @YesterdayBeginDateTime AS YesterdayBeginDateTime, @YesterdayEndDateTime AS YesterdayEndDateTime
, @Day3BeforeBeginDateTime AS Day3BeforeBeginDateTime, @Day3BeforeEndDateTime AS Day3BeforeEndDateTime
, @Day7BeforeBeginDateTime AS Day7BeforeBeginDateTime, @Day7BeforeEndDateTime AS Day7BeforeEndDateTime
, @Day14BeforeBeginDateTime AS Day14BeforeBeginDateTime, @Day14BeforeEndDateTime AS Day14BeforeEndDateTime
, @Day30BeforeBeginDateTime AS Day30BeforeBeginDateTime, @Day30BeforeEndDateTime AS Day30BeforeEndDateTime
, @LastMonthBeginDateTime AS LastMonthBeginDateTime, @LastMonthEndDateTime AS LastMonthEndDateTime
, @LastWeekBeginDateTime AS LastWeekBeginDateTime, @LastWeekEndDateTime AS LastWeekEndDateTime
, @DateID AS DateID