ORACLE 如何查询被锁定表及如何解锁释放session

查询被锁定的表：

--锁表查询
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;

释放锁定：
--释放SESSION SQL:
--alter system kill session 'sid, serial#';
ALTER system kill session '23, 1647';