sql 时间计算
---兩個時間之差的合計
DECLARE @I INT
SET @I = DATEDIFF(ms,GETDATE()-RAND()*24,GETDATE())
SELECTconvert(varchar(10), @I/86400000) + ' Days ' +convert(varchar(10), (@I%86400000)/3600000) + ' Hours '+convert(varchar(10), (@I%3600000)/60000) + ' Mins '+convert(varchar(10), (@I%60000)/1000) + ' sec ' +convert(varchar(10), @I%1000) + ' ms ' AS [DD:HH:MM:SS:MS]-- Find Hours, Minutes and Seconds in between two datetime
DECLARE @First datetime
DECLARE @Second datetime
SET @First = '04/02/2008 05:23:22'
SET @Second = getdate()SELECT DATEDIFF(day,@First,@Second)*24 as TotalHours,
DATEDIFF(day,@First,@Second)*24*60 as TotalMinutes,
DATEDIFF(day,@First,@Second)*24*60*60 as TotalSeconds select DateDiff ('d','1999-05-01','1999-03-07')
/*
--Geovin Du 塗聚文 締友計算機信息技術有限公司
year yy, yyyy
quarter qq, q
Month mm, m
dayofyear dy, y
Day dd, d
Week wk, ww
Hour hh
minute mi, n
second ss, s
millisecond ms
*/---分鍾化小時
DECLARE @strardate datetime,@enddate datetime,@hour int,@minute float
set @strardate='2011-08-15 18:00'
set @enddate='2011-08-15 22:45'
select @hour=DateDiff(hour,@strardate,@enddate)
select @minute=DateDiff(minute,@strardate,@enddate)%60
select @hour
select @hour+@minute/60
select @hour+round(@minute/60,1,1)---四舍五入SELECT ROUND(150.75, 0);
GO
SELECT ROUND(150.75, 0, 1);
GOselect DateDiff(hh,@strardate,@enddate)
select DateDiff(mi,@strardate,@enddate)declare @hms varchar(8)
set @hms = '10:30:00'
declare @hours int
declare @minutes decimal
set @hours = datepart(hour, @hms)
set @minutes = datepart(minute, @hms)
select @minutes/60+@hours
select round(@minutes/60,1)+@hours---四舍五入---公司的加班計算，當大於半小時計加班半小時，不足半小時，不計加班
DECLARE @strardate datetime,@enddate datetime,@hour int,@minute float,@minutes float
set @strardate='2011-08-15 18:00'
set @enddate='2011-08-15 22:45'
select @hour=DateDiff(hour,@strardate,@enddate)
select @minute=DateDiff(minute,@strardate,@enddate)%60
--select @hour+round(@minute/60,1,1)
set @minutes=@minute/60
if @minutes>0.5set @minutes=0.5
if @minutes<0.5set @minutes=0
select @minutes
select @hour
--select @minute
select @hour+@minutes
---
select sum(TotalSeconds) / 86400 as Days,(sum(TotalSeconds) % 86400) / 3600 as Hours, (sum(TotalSeconds) % 3600) / 60 as Minutes, sum(TotalSeconds) % 60 as Seconds
from
(select EventID, DateDiff(second, StartDate, EndDate) as TotalSeconds from Events
) x
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