查询所有会话
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;
强行结束会话
alter system kill session ‘sid,serial‘;
oracle错误处理之ORA-00054:资源正忙,要求指定NOWAIT
原文：http://www.cnblogs.com/modou/p/6438177.html