Removing information from a dataset that is contained elsewhere

[mphqueens]

I have two data sets, A and B.  A is larger and contains all the same information as B plus extra (B was created from A using proc sql - selecting distinct observations). I would like to remove everything that is contained in data set B from data set A to have two distinct sets with no duplicate variables. 

How would I go about this? 

[jklaverstijn]

How about this

Proc sql;
Create table c as
Select * from a where nog exists (select * from b);
Quit;

[ballardw · Accepted solution]

If all the variables are the same

Proc sql;
   create table want as
   select * from A
   except
   select * from B
   ;
quit;

I think @jklaverstijn may have meant NOT instead of NOG