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select  s.username, 
  decode(l.type,'TM','TABLE  LOCK', 
                              'TX','ROW  LOCK', 
                              NULL)  LOCK_LEVEL, 
  o.owner,o.object_name,o.object_type, 
  s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser 
  from  v$session  s,v$lock  l,dba_objects  o 
  where  s.sid=l.sid 
  and  o.object_id=l.id1 
  and  s.username  is  not  null
alter system kill session 'sid,serial#'
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