CPU usage of an Oracle session

Below query help to  find out the CPU usage(Second) for a  oracle session session.

select
   ss.sql_id "SQL_ID",ss.username,ss.status,ss.machine,b.sql_text,b.PLAN_HASH_VALUE,
   VALUE/100 cpu_usage_seconds
from
   gv$session ss,
   gv$sesstat se,
   gv$statname sn,
   gv$sql b
where
   se.STATISTIC# = sn.STATISTIC#
and
   NAME like '%CPU used by this session%'
and
   se.SID = ss.SID and ss.sql_id=b.sql_id
and
   ss.status='ACTIVE'
and
   ss.username is not null
order by VALUE desc;

Thanks,
Jyothish