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Datetime Checks


Datetime Checks

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ishaan99
ishaan99
Old Hand
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Group: General Forum Members
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I have a table with a column as dateentered with datatype varchar(10). I want to check this column with getdate(). Now since getdate() return date with time. and if i do cast(dateenetered as datetime) - this return only date with tiem as 00:00:00. How is it possibel to check only the date part ex if dateentered values are

2009-01-07 00:00:00.000
2009-01-07 00:00:00.000
and if select getdate() returns 2009-01-08 14:42:15.613
i need to check only 2009-01-07 with 2009-01-08 ignoring the time. ANy help on this will be greatly appreciated. TIA



RBarryYoung
RBarryYoung
SSCrazy Eights
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There are several ways to strip the time out, here is one:

select cast(floor(cast(getdate() as Float)) as datetime)



-- RBarryYoung, (302)375-0451 blog: MovingSQL.com, Twitter: @RBarryYoung
Proactive Performance Solutions, Inc.
"Performance is our middle name."
Mike - CI
Mike - CI
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RBarryYoung (1/8/2009)
There are several ways to strip the time out, here is one:

select cast(floor(cast(getdate() as Float)) as datetime)



I had always used
select cast(convert(char(10), getdate(), 101) as datetime)

but this way is more slick.
RBarryYoung
RBarryYoung
SSCrazy Eights
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The "DATEDIFF" method is supposed to be the fastest, but I can never remember it off the top of my head.

-- RBarryYoung, (302)375-0451 blog: MovingSQL.com, Twitter: @RBarryYoung
Proactive Performance Solutions, Inc.
"Performance is our middle name."
RBarryYoung
RBarryYoung
SSCrazy Eights
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Group: General Forum Members
Points: 9436 Visits: 9517
Figured it out:

Select DATEADD(dd,DATEDIFF(dd,0, getdate()), 0)



-- RBarryYoung, (302)375-0451 blog: MovingSQL.com, Twitter: @RBarryYoung
Proactive Performance Solutions, Inc.
"Performance is our middle name."
Jeff Moden
Jeff Moden
SSC-Forever
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Group: General Forum Members
Points: 44972 Visits: 39864
If the following formula results in zero, the data was entered today, regardless of time...

SELECT DATEDIFF(dd,datecolumn,GETDATE())

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
     Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is usually not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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