Using the SAS Language:

Write a macro to combine 2 data sets. Test it with enough calls to show it works as written.

The input parameters for the macro are:

The names of the 2 data sets to be combined

The name of the output data set, if applicable

The type of combine to do

The variable on which to combine, if applicable

The macro must be able to handle 3 different combination types

The macro must work on any 2 valid SAS data sets.