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set variable to go back one year from today

Posted on 2015-01-30
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Last Modified: 2015-01-30
I Need to insure that I go back one year from today. The variables are both datetime @sdate and @edate, we have the @sdate set to Getdate().  We need to set the @edate  to insure it goes back one year from today..can anyone help.
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Question by:steven
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6 Comments
 
LVL 66

Accepted Solution

by:
Jim Horn earned 2000 total points
ID: 40580581
Something like ...
Declare @sdate datetime, @edate datetime

SELECT @sdate = GETDATE()
SELECT @edate = DATEADD(year, -1, @sdate) 

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btw s and e implies Start and End, and in your example start is a year after end.  
Might be confusing.
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Author Closing Comment

by:steven
ID: 40580588
Thanks so Much!
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Author Comment

by:steven
ID: 40580597
SORRY THIS DIDN'T WORK Results below..can you please help.

declare  @sdate         datetime,        
         @edate         datetime
SELECT @sdate = GETDATE()
SELECT @edate = DATEDIFF(year, -1, @sdate)
select @sdate,@edate


RESULTS:
2015-01-30 15:52:01.247
1900-04-27 00:00:00.000
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Author Comment

by:steven
ID: 40580617
I have it now thanks


declare  @sdate         datetime,        
         @edate         datetime

SELECT @edate = dateadd(yy, -1, GETDATE())
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LVL 66

Expert Comment

by:Jim Horn
ID: 40580631
My bad, DATEDIFF should have been DATEADD.  Corrected in first post.
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Author Comment

by:steven
ID: 40580717
Thanks...
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