far in this chapter, we've combined data sets based on the order of
the observations in the input data sets. But sometimes you need to
combine observations from two or more data sets into a single
observation in a new data set according to the values of a common
variable. This is called match-merging.
When you match-merge, you use a MERGE statement rather than a SET
statement to combine data sets.
General form, basic DATA step
output-SAS-data-set names the data set
to be created.
SAS-data-set-1 and SAS-data-set-2 specify the data sets to
variable(s) in the