Top cpu consuming sessions - oracle database script

col program form a30 heading "Program" col CPUMins form 99990 heading "CPU in Mins"
SELECT rownum AS rank,
       a.*
FROM (
SELECT v.sid,
       program,
       v.value / (100 * 60) CPUMins
FROM v$statname s,
     v$sesstat v,
     v$session sess
WHERE s.name = 'CPU used by this session'
  AND sess.sid = v.sid
  AND v.statistic#=s.statistic# and v.value>0 ORDER BY v.value DESC) a where rownum < 11;