Query Oracle database lock table sql

select object_name, machine, s.sid, s.serial#
  from v$locked_object l, dba_objects o, v$session s
where l.object_id　 = 　o.object_id
   and l.session_id = s.sid;


select  *
  from v$locked_object l, dba_objects o, v$session s
where l.object_id　 = 　o.object_id
   and l.session_id = s.sid;