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DATEFLOOR : Rounding dates to nearest day,hour,minute,second

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This function takes a date and a date part parameter and rounds the date down to the nearest date part.

Credit goes to "Gordon Klundt"

Example:
In order to round '2010-11-03 17:44:10.117' to the nearest hour ('2010-11-03 17:00:00.000')

Click here to copy the following block
select dbo.datefloor(cast('2010-11-03 17:44:10.117' as datetime),'hh')


Click here to copy the following block
create function dbo.DATEFLOOR (
 @seed datetime
, @part varchar(2)
)
returns datetime
as
begin

/*
Sample Usage (uses standard dateparts):
select 'second', dbo.datefloor(getdate(),'ss') union all
select 'minute', dbo.datefloor(getdate(),'mi') union all
select 'hour' , dbo.datefloor(getdate(),'hh') union all
select 'day' , dbo.datefloor(getdate(),'dd') union all
select 'month' , dbo.datefloor(getdate(),'mm') union all
select 'year' , dbo.datefloor(getdate(),'yy')
*/


declare @second datetime
declare @minute datetime
declare @hour datetime
declare @day datetime
declare @month datetime
declare @year datetime
declare @retDate datetime

select @second = dateadd(ms,-1*datepart(ms,@seed), @seed)
select @minute = dateadd(ss,-1*datepart(ss,@second), @second)
select @hour = dateadd(mi,-1*datepart(mi,@minute), @minute)
select @day = dateadd(hh,-1*datepart(hh,@hour), @hour)
select @month = dateadd(dd,-1*(day(@day)-1), @day)
select @year = dateadd(mm,-1*(month(@month)-1), @month)

select @retDate = case
when @part = 'ss' then @second
when @part = 'mi' then @minute
when @part = 'hh' then @hour
when @part = 'dd' then @day
when @part = 'mm' then @month
when @part = 'yy' then @year
end

return @retDate
end

go


Submitted By : Nayan Patel  (Member Since : 5/26/2004 12:23:06 PM)

Job Description : He is the moderator of this site and currently working as an independent consultant. He works with VB.net/ASP.net, SQL Server and other MS technologies. He is MCSD.net, MCDBA and MCSE. In his free time he likes to watch funny movies and doing oil painting.
View all (893) submissions by this author  (Birth Date : 7/14/1981 )


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