The following fragment shows how to use INVOKE and FINISH to work
    with two databases:

    &RDB&  INVOKE DATABASE WORKERS =
    &RDB&    FILENAME 'DISK2:[DEPT4]EMPLOYEES'
    &RDB&  INVOKE DATABASE PARTS =
    &RDB&    FILENAME 'DISK2:[DEPT4]PARTS'
          .
          .
          .
    !   [This part of the program can combine data from
         both databases]
          .
          .
          .
    &RDB&  FINISH WORKERS
          .
          .
          .
    !   [This part of the program uses only
         the PARTS database]
          .
          .
          .
    &RDB&  FINISH PARTS

    Between the second INVOKE statement and the first FINISH, you can
    access both databases at once.