Is it somehow possible that SAS with the help of some keyword only have newvar1 in file1 in addition to all other variables. And in file2 its only consist all variables + newvar2.
This is very simple with drop and keep. But is it possible without, make sas execute partly? May be this is to make it more difficult. But I just want to know if its possible in other way or not. I cannot figure out another way than using drop and keep.