提交事务的时候提示(被一个用户锁住的解决方法)
 
select object_id,session_id,locked_mode from v$locked_object;
 
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#';
 
alter system kill session '7,10839'