oracle查詢cpu高佔用

SELECT 'alter system kill session '''||sid||','||serial#||''';' from v$session where sql_id in(select sql_id from v$session  
  where paddr in(  
    select addr from v$process  
    where spid in(select spid from 
　　v$sqlarea,v$session,v$process
　　where v$sqlarea.address=v$session.sql_address and spid is not null)  
 ) );