topic Re: Conditional join on two variables in SAS Programming

Conditional join on two variables

lillymaginta — Sat, 13 Feb 2016 19:57:26 GMT

I am trying to remerge two datasets under the following conditions:

dataset1: more than one observation per id and multiple date per id

id date age sex

1 ..

2...

3...

I created dataset 2 and selected distint id and the min(date)

dataset 2, one observation per id

id min_date

Now I want to remerge the data back to get all the other variables, how can I create an inner joint statement using both id and min(date) to get the other information specific to that date in the original dataset

Re: Conditional join on two variables

LinusH — Sat, 13 Feb 2016 20:03:26 GMT

Just inner join on Id and Date = min_date?

If I understand correctly you can do this on one pass of the data, avoiding the join.
You could use group by ID and do having date = min (date).

Re: Conditional join on two variables

lillymaginta — Sat, 13 Feb 2016 20:49:06 GMT

Thanks it worked!