Oracle锁表查询及解锁

--查询锁表
SELECT object_name, machine, s.sid, s.serial#
  FROM gv$locked_object l, dba_objects o, gv$session s
 WHERE l.object_id　 = o.object_id
   AND l.session_id = s.sid;
--解锁
--alter system kill session 'sid, serial#'; 
ALTER system kill session '23, 1647';