From: SAS Swamy on
All,

Can someone please let me know , What exactly would be the use for using
IN option in data set

For e-g
data vacdata;
length src $1.;
set datasetA (in=in1)
datasetB (in=in2);
if in1 then src='1'; else src='2';
format src $1.;
run;

I was trying to find the documentation , but somehow I am able to see only
for MERGE function, possible please send me the links with details If any

- swamy