Deletes a database.

    When this statement executes in Oracle Rdb, SQL deletes all
    the database root and storage area files associated with the
    database.

    If you specify a repository path name in the DROP DATABASE
    statement or specify an alias for a database attached with the
    PATHNAME argument, SQL also deletes the repository directory that
    contains the database definitions.

                                 CAUTION

       Use the DROP DATABASE statement with care. You cannot use
       the ROLLBACK statement to cancel a DROP DATABASE statement.
       When you use this statement, SQL deletes the database root
       and storage area files, which include all data and all
       definitions.