You can improve performance by using SUM to add the contents of fields. The SUM statement adds the contents of specified SUM fields in records with identical control fields. The result is placed in one record while the other record is deleted, thus reducing the number of records to be output by DFSORT.

You can use installation option ZDPRINT=YES or run-time option ZDPRINT to specify that positive zoned decimal fields that result from summing are to be printable. That is, you can tell DFSORT to change the last digit of the zone from hex C to hex F.