The SORT Procedure : Integrity Constraints
Sorting the data set in place
without OUT= preserves both referential
and general integrity constraints, as well as any indexes that they may require.
A sort using the OUT= option will not preserve any integrity constraints or
indexes. For more information on integrity constraints, see the section on
SAS files in SAS Language Reference: Concepts.
Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
