The APPEND procedure adds the observations from one
SAS data set to the end of another SAS data set. PROC APPEND does
not process the observations in the first data set. It adds the observations
in the second data set directly to the end of the original data set.
The APPEND procedure
has the following form:
PROC APPEND BASE=base-SAS-data-set <DATA=SAS-data-set-to-append>
names the SAS data
set to which you want to append the observations. If this data set
does not exist, then SAS creates it. At the completion of PROC APPEND,
the value of base-SAS-data-set becomes
the current (most recently created) SAS data set.