Types of privileges:

       db-privs-ansi
       table-privs-ansi
       column-privs-ansi
       module-privs-ansi
       ext-routine-privs-ansi
       sequence-privs-ansi

    Specifies the list of privileges you want to remove from an
    existing access privilege set entry. The operations permitted
    by a given privilege keyword differ, depending on whether it
    was granted for a database, table, column, module, routine, or
    sequence. The Privileges Table in the GRANT lists the privilege
    keywords and their meanings for databases, tables, modules,
    external routines and sequences.