一、查看锁表的相关表

SELECT * FROM v$lock;
SELECT * FROM v$sqlarea;
SELECT * FROM v$session;
SELECT * FROM v$process ;
SELECT * FROM v$locked_object;
SELECT * FROM all_objects;
SELECT * FROM v$session_wait;

二、查看被锁表信息

1.查看被锁的表

select b.owner,b.object_name,a.session_id,a.locked_mode 
from v$locked_object a,dba_objects b 
where b.object_id = a.object_id;

详细信息：

select sess.sid, 
sess.serial#, 
lo.oracle_username, 
lo.os_user_name, 
ao.object_name, 
lo.locked_mode,
sess.LOGON_TIME,
sess.machine
from v$locked_object lo, 
dba_objects ao, 
v$session sess 
where ao.object_id = lo.object_id and lo.session_id = sess.sid order by sess.logon_time desc

2.查看哪个用户哪个进程造成死锁

select b.username,b.sid,b.serial#,logon_time 
from v$locked_object a,v$session b 
where a.session_id = b.sid order by b.logon_time;

3.查看连接的进程

SELECT sid, serial#, username, osuser FROM v$session;

4.查出锁定表的sid, serial#,os_user_name, machine_name, terminal，锁的type,mode

SELECT s.sid, s.serial#, s.username, s.schemaname, s.osuser, s.process, s.machine,
s.terminal, s.logon_time, l.type
FROM v$session s, v$lock l
WHERE s.sid = l.sid
AND s.username IS NOT NULL
ORDER BY sid;

这个语句将查找到数据库中所有的DML语句产生的锁，还可以发现，任何DML语句其实产生了两个锁，一个是表锁，一个是行锁。

三、杀掉进程 sid,serial#

通过上面得到的锁表的SID，和serial#，就可以用以下语句kill掉这个进程了！

alter system kill session '210,11562';

附：

oracle11g安装方法参考：Linux7静默安装Oracle11g的教程，亲测实用有效！