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DateAdd Function ???

Posted on 2006-06-21
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Last Modified: 2008-02-26
I have a date in the format yyyymm and I want to be able to take 1 month off.

IE: 200606 would become 200605 I could just use [month]-1 but that would only work for 11 months of the year as 200601 would become 200600 and I want it to be 200512.

I think I need the dateadd function but cant for the life of me figure it out.

Carl.
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Question by:Carl2002
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8 Comments
 
LVL 77

Expert Comment

by:peter57r
ID: 16949736
Hi Carl2002,

If you are storing the date in  a datetime field then you can use Dateadd() to subtract 1 month.


Pete
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LVL 4

Author Comment

by:Carl2002
ID: 16949748
The field is a result of a query the query is simply Format(now(),"yyyymm"). Will this be a string ?
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LVL 16

Expert Comment

by:Rick_Rickards
ID: 16949825
Format(DateSerial(Left([Field], 4), Right([Field], 2), 0), "yyyymm")
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LVL 4

Author Comment

by:Carl2002
ID: 16949845
This works to find the prior month but how would it then find 6 months ago ?
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LVL 77

Expert Comment

by:peter57r
ID: 16949869
Carl2002,
You said you wanted to take 1 month off; where does 6 months come into it?

Pete
0
 
LVL 4

Author Comment

by:Carl2002
ID: 16949884
OK sorry guys think my initial question didn't explain it all. I do want to take 1 month off, but there will be times I want to take more than 1 month off. Is this possible?
0
 
LVL 16

Expert Comment

by:Rick_Rickards
ID: 16949916
Another way to take 1 Month off...
Format(DateSerial(Left([Field], 4), Right([Field], 2)-1,1), "yyyymm")

To Take 6 months off...
Format(DateSerial(Left([Field], 4), Right([Field], 2)-6, 1), "yyyymm")

To Add 6 Months...
Format(DateSerial(Left([Field], 4), Right([Field], 2)+6, 1), "yyyymm")
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LVL 77

Accepted Solution

by:
peter57r earned 220 total points
ID: 16949933
format (dateadd("m",-6, Now()), "yyyymm")

Set the -6 to whatever you want.

Pete
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