Privileges audited in database - oracle database script

col user_name
FOR a12 heading "User name" col privilege
FOR a30 heading "Privilege"
SET pages 1000 prompt prompt SYSTEM PRIVILEGES audited across SYSTEM
SELECT user_name,
       privilege,
       success,
       failure
FROM dba_priv_audit_opts
ORDER BY user_name,
         proxy_name,
         privilege /