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identifying observations 12 month period

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Frequent Contributor
Posts: 75

identifying observations 12 month period

I can't find an example using a DATA step with multiple SET statements.

 

I need to find previous 12 months observations based off a DATETIME value.

 

I'm pulling previous month easily by:

MONTH(DATEPART(DATETIME)) = MONTH(TODAY() -1);

 

I remember running across an example before but cannot find it.

Super User
Super User
Posts: 7,997

Re: identifying observations 12 month period

Its quite hard to see what your after from that, test data in the form of a datastep and what you want out will help.  Can you not sort the data, then use lag()?  SQL can simply merge these too.  If its an agregate then a where might be better.

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