oracle锁表解除

--Oracle数据库操作中，我们有时会用到锁表查询以及解锁和kill进程等操作，那么这些操作是怎么实现的呢？本文我们主要就介绍一下这部分内容。

 

--锁表查询的代码有以下的形式：

select count(*) from v$locked_object;

select * from v$locked_object;

 

 

 

 

 --查看哪个表被锁

 

 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;

 

 

 

--查看是哪个session引起的

 

 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;

 

 

 

执行命令：alter system kill session'1025,41';

 

其中1025为sid, 41为serial#.

 

锁表详情：

 

 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