How would you code a merge that will write the matches of
both to one data set, the non-matches from the left-most
data set to a second data set, and the non-matches of the
right-most data set to a third data set.
How will you react when, while consulting a SAS
documentation manual to get an answer to a problem, someone
says hey, I thought you were supposed to know all that
stuff already, and not have to look it up in a book?