解决PLSQL记录被另一个用户锁住的问题

原文地址  http://blog.csdn.net/jarniyy/article/details/51133214

1、查看数据库锁,诊断锁的来源及类型：
select object_id,session_id,locked_mode from v$locked_object;
或者用以下命令： 
select b.owner,b.object_name,l.session_id,l.locked_mode
from v$locked_object l, dba_objects b where b.object_id=l.object_id 

2、找出数据库的serial#,以备杀死：

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; 
3、杀死该session: 　　
alter system kill session 'sid,serial#'