select o.sid, osuser, machine, count(*) num_curs
 from v$open_cursor o, v$session s
 where user_name = 'AF651_U8'
  and o.sid = s.sid
 group by o.sid, osuser, machine
 order by num_curs desc;
SID OSUSER MACHINE NUM_CURS

select q.sql_text
 from v$open_cursor o, v$sql q
 where q.hash_value = o.hash_value
  and o.sid = 396;