DFSORT can perform various "join" operations on two data sets by one or more keys. You can create joined records in a variety of ways including inner join, full outer join, left outer join, right outer join and unpaired combinations. The two input data sets can be of different types (fixed, variable, VSAM, and so on) and have keys in different locations. The records from the two input files can be processed in a variety of ways before and after they are joined.