解锁
select t2.username,t2.sid,t2.serial#,t2.logon_time
from v$locked_object t1,v$session t2
where t1.session_id=t2.sid order by t2.logon_time
alter system kill session 'sid,serial#';
查看谁锁住的
select t2.username
from v$locked_object t1,v$session t2
where t1.session_id=t2.sid order by t2.logon_time