topic Re: Proc Sort to Proc sql in SAS Programming

Proc Sort to Proc sql

kajal_30 — Mon, 11 Feb 2019 16:11:15 GMT

Hi Channel,

I am trying to run the following code but not getting identical results

please advice

This is what I have:

PROC SORT DATA = A OUT = B;
BY T;
QUIT;

This is what I want:

PROC SQL;
CREATE TABLE B AS SELECT *
FROM A
GROUP BY T
ORDER BY T
;
QUIT;

Thanks

Re: Proc Sort to Proc sql

novinosrin — Mon, 11 Feb 2019 16:13:24 GMT

Can you post a sample data for folks to test plz

Re: Proc Sort to Proc sql

Astounding — Mon, 11 Feb 2019 16:23:08 GMT

PROC SQL does not guarantee the order of the observations as they are read in. It can very well read observations from A in a different order than they appear within A.

PROC SORT does guarantee the incoming order is the same as the order in A. However, there is a further complication depending on whether the option EQUALS (usually the default) or NOEQUALS is in effect.

If the observations take on unique values for T, you will always get the same result. If there might be multiple observations for the same value of T, you can get different results. In both cases, the output will be sorted by T. But within identical values of T, the order can be different.