will replace the contents of DEPT-NAME in the current record of the record type with
the contents of DEPT-NAME in the DEPT record area. The MODIFY statement may
specify a record name, or a list of data item names associated with the same record.
If the keyword MODIFY is used on its own, it references the current record of the
run unit.
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The ERASE statement deletes one or more records from the database. The effect of
ERASE is complicated by the fact that the record to be erased may own member
records, in which case the DBMS needs to know whether it should erase the owner but
leave the members, or erase the member records along ...
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