In the following example, a record is stored in YACHTS and
       a series of collections is formed. The DROP statement is
       illustrated using the SELECT, DROP, ERASE, and PRINT statements
       and the SHOW collection-name command:

       DTR> READY YACHTS WRITE
       DTR> STORE YACHTS USING BUILDER = "HINKLEY",
       DTR> FIND YACHTS WITH BUILDER = "HINKLEY"
       [1 record found]
       DTR> FIND A IN CURRENT
       [1 record found]
       DTR> FIND B IN YACHTS
       [114 records found]
       DTR> SELECT B; PRINT B.BOAT

                                      LENGTH
                                       OVER
       MANUFACTURER   MODEL     RIG    ALL   WEIGHT BEAM  PRICE

        ALBERG      37 MK II   KETCH   37    20,000  12  $36,951

       DTR> FIND C IN YACHTS
       [114 records found]
       DTR> SELECT LAST; PRINT

                                      LENGTH
                                       OVER
       MANUFACTURER   MODEL     RIG    ALL   WEIGHT BEAM  PRICE

        WRIGHT      SEAWIND II SLOOP   32    14,900  00  $34,480

       DTR> SHOW C
       Collection C
           Domain: YACHTS
           Number of Records: 114
           Selected Record: 114
       DTR> DROP
       DTR> SHOW C
       Collection C
           Domain: YACHTS
           Number of Records: 114
           Selected Record: 114 (Dropped)
       DTR> PRINT

                                      LENGTH
                                       OVER
       MANUFACTURER   MODEL     RIG    ALL   WEIGHT BEAM  PRICE

        ALBERG      37 MK II   KETCH   37    20,000  12  $36,951

       DTR> DROP

       Target record has already been dropped.
       DTR> SHOW B
       Collection B
           Domain: YACHTS
           Number of Records: 114
           Selected Record: 1
       DTR> DROP B
       DTR> SHOW B
       Collection B
           Domain: YACHTS
           Number of Records: 114
           Selected Record: 1 (Dropped)
       DTR> RELEASE C
       DTR> DROP
       Target record has already been dropped.
       DTR> ERASE
       No target record for ERASE.
       DTR> RELEASE B
       DTR> PRINT
       No record selected, printing whole collection

                                      LENGTH
                                       OVER
       MANUFACTURER   MODEL     RIG    ALL   WEIGHT BEAM  PRICE

        HINKLEY                                   0  00

       DTR> DROP
       No collection with selected record for DROP.
       DTR> SHOW CURRENT
       Collection A
           Domain: YACHTS
           Number of Records: 1
           No Selected Record
       DTR> SELECT; ERASE; SHOW CURRENT
       Collection A
           Domain: YACHTS
           Number of Records: 1
           Selected Record: 1 (Erased)
       DTR> DROP
       No collection with selected record for DROP.
       DTR>