Answer Posted / mehul thakkar

There are two ways of deleting the records from the dataset
with the help of PROC SORT.
1. Using NODUP/NODUPRECS
2. Using NODUPKEY

The first option deletes the records only if all the
variables values are repeated in the subsequent records.

The second options deletes the records only if the value of
the BY variables given in the BY clause are repeated in the
subsequent records.

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