Understanding Generation Data Sets
You have learned that you can keep an audit trail to
track observation updates made to an individual data set in place.
However, if you replace the data set, the audit trail is lost. Generation
data sets enable you to maintain multiple versions or generations
of a SAS data set. A new generation is created each time the file
is replaced.
By default, generation
data sets are not in effect. As the SAS data set A is replaced, there
are two copies of A in the SAS library. When the DATA step completes
execution, SAS removes the original copy of the data set A from the
library.
When generation data sets are in effect ...
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