当在PL/SQL执行脚本，但是一直处于处理状态，考虑是表被锁住
1、先执行以下脚本，查看哪几张表被锁住
SELECT /*+ rule */ s.username,
decode(l.type,‘TM‘,‘TABLE LOCK‘,
‘TX‘,‘ROW LOCK‘,
NULL) LOCK_LEVEL,
o.owner,o.object_name,o.object_type,
s.sid,s.serial#,s.terminal,s.machine,s.program,s.osuser
FROM v$session s,v$lock l,dba_objects o
WHERE l.sid = s.sid
AND l.id1 = o.object_id(+)
AND s.username is NOT Null
2、 再执行以下脚本将锁住的表进行解锁
alter system kill session ‘480,22638‘
原文：http://www.cnblogs.com/lianjiea/p/6255546.html