How to Elimate Duplicate Records
Using id and rd operators
Command Operator USAGE identify duplicates id id s11 - Creates a set of records with all duplicate ones grouped together. remove duplicates rd rd s3 - Removes duplicates in set 3
NOTE: Generally, you will just be using this operator, as this reduces the number of results that you may need to display.
NOTE: Only sets created by rd can be used in subsequent select (s) commands.
Using the not operator
If s1 is larger than s2, then create the following combination search: