Kill oracle session

select s.username,s.sid,s.serial#,p.spid,s.status,s.program,s.terminal,
         'alter system kill session '||''''||s.sid||','||s.serial#||''';' oracle_kill,
         'kill -9 '||p.spid unix_kill,
         'orakill '||i.instance_name||' '||p.spid windows_kill
 from v$session s,v$process p,v$instance i
 where s.paddr=p.addr
 and s.type='USER'
 and s.sid='298'
 and s.username is not null