format sql date

declare @StartDate as date
declare @EndDate as date
set @StartDate = '1/14/2013'
set @EndDate = '1/14/2013'
declare @today as date
set @today = FORMAT( @today, 'dd/MM/yyyy') --(CONVERT(VARCHAR(10), GETDATE(), 101))
print @today --2013-01-14
if(@today != @StartDate)
print 'yes'
else
print 'no'


why isn't the above valid? how do i do this? i just need to today and startdate to match up
fwstealerAsked:
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Chris LuttrellConnect With a Mentor Senior Database ArchitectCommented:
1st, as jimhorn is pointing out, you do not store anything in a DATE type variable in any format, it is always stored in the internal numberic date datatype, you can just display it in different formats using the CONVERT or FORMAT functions when retrieving it.

What are you wanting to do, just get the current date into the variable @today?
If so then use either GETDATE() or the ANSI standard CURRENT_TIMESTAMP to assign todays date to a variable like this:
set @today = CURRENT_TIMESTAMP
 modifing your code to this:
declare @StartDate as date
declare @EndDate as date
set @StartDate = '1/14/2013'
set @EndDate = '1/14/2013'
declare @today as date
set @today = CURRENT_TIMESTAMP--FORMAT( @today, 'dd/MM/yyyy') --(CONVERT(VARCHAR(10), GETDATE(), 101))
print @today --2013-01-14
if(@today != @StartDate)
print 'yes'
else
print 'no'

Open in new window

results in this output:
2013-01-14
no

Open in new window

which by your logic means that @today does equal @StartDate
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Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
You can't format a date and set it to a date variable.

Perhaps you want to do..
IF CONVERT(VARCHAR(10), GETDATE(), 101) = CONVERT(VARCHAR(10),@StartDate, 101)  THEN
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Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
FORMAT returns a nvarchar value, not a date value.
So you won't be able to compare a nvarchar to a date without risking an implicit conversion error.
http://msdn.microsoft.com/en-us/library/hh213505.aspx
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fwstealerAuthor Commented:
declare @StartDate as date
declare @EndDate as date
set @StartDate = '1/15/2013'
set @EndDate = '1/15/2013'
declare @today as date
set @today = CURRENT_TIMESTAMP--FORMAT( @today, 'dd/MM/yyyy') --(CONVERT(VARCHAR(10), GETDATE(), 101))
print @today --2013-01-14
if(@today = @StartDate)
print 'yes'
else
print 'no'

so I change it to do the above
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Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
Just curious ... how did my first comment not solve the problem?
0
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