02-05-2015 08:12 AM
It is possible in data step but give some example data sets. Instead I make a guess of what you want, you provide small example data sets and the output data set you desire.
02-05-2015 08:16 AM
merge dataset_a dataset_b dataset_c;
by idvar1 idvar2;
But it depends on the type of join you want, left/right/inner/outer etc. They all have differing requirements.