topic Re: SAS dates - within last 3 months in SAS Programming

SAS dates - within last 3 months

CamRutherford — Fri, 10 Mar 2017 12:27:38 GMT

Hello,

I have a data step whereby I'm selecting around 50,000 customers. In the output file I have date fields (DATE9.) and I want to create an if statement that will create a value for only those dates which fall in the last 3 months. So far I have the below, please advise where I'm going wrong and how I can do this?

IF TXN_DATE BETWEEN TODAY() AND TODAY()-3 THEN DO;R_SCORE=50;END;

Thanks

Re: SAS dates - within last 3 months

Astounding — Fri, 10 Mar 2017 12:32:42 GMT

SAS stores dates as referring to a particular day. So TODAY()-3 is three days earlier. Change it to something like TODAY()-90 and you should be fine.

It's possible (can't test it right now) that you can't use BETWEEN in an IF statement. That's easy enough to change:

if TODAY()-90 <= TXN_DATE <= TODAY() then R_SCORE=50;

Re: SAS dates - within last 3 months

Kurt_Bremser — Fri, 10 Mar 2017 12:37:13 GMT

Don't shout your code. Normal speech is sufficient (don't write code in all capitals, for readability)

The between operator is only available in where conditions, use this instead:

if intnx('month',today(),-3,'same') <= txn_date <=today()
then do;
  r_score = 50;
end;

Assuming that txn_date is a SAS date value, of course

Re: SAS dates - within last 3 months

CamRutherford — Fri, 10 Mar 2017 12:36:10 GMT

Legend - thank you

Re: SAS dates - within last 3 months

RW9 — Fri, 10 Mar 2017 12:45:56 GMT

Just to note @Astounding, that is assuming a base value of 30 days per month. That may not be entirely acurate. I would suggest using the function for it:

if intnx('month',today(),-3) <= txn_date <= today() then r_score=50;