oracle 查看被锁表 及解除锁定

查看 哪些表 被锁了 

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; 

解除锁定：

--alter system kill session 'sid, serial#'; 
ALTER system kill session '23, 1647';