text: SPOOL features.txt
  set lines 300
  show parameter db_unique_name
  select      name, 
              version, 
              detected_usages, 
              currently_used, 
              first_usage_date, 
              last_usage_date, 
              description
  from        DBA_FEATURE_USAGE_STATISTICS  
  where       detected_usages > 0 
  order by    name, version;
  
  SELECT  PARAMETER C1,
          VALUE     C2
   FROM   X$OPTION;
  
  spool off
  