Also note that PROC SORT manipulates the uncompressed observation in memory and,
if there is insufficient memory to complete the sort, stores the uncompressed data in a
utility file. For these reasons, sorting compressed data sets might be intensive and
require more storage than anticipated. Consider using the TAGSORT option when
sorting compressed data sets.
Note:If the SAS system option NOREPLACE is in effect, then you cannot replace an
original permanent data set with a sorted version. You must either use the OUT=
option or specify the SAS system option REPLACE in an OPTIONS statement. The
SAS system option NOREPLACE does not affect temporary ...
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