查看Oracle中是否有锁表

转自：http://blog.csdn.net/mehear/article/details/11536359

1、查看是否有锁表的sql

 select 'blocker('||lb.sid||':'||sb.username||')-sql:'|| qb.sql_text  blockers,
        'waiter ('||lw.sid||':'||sw.username||')-sql:'|| qw.sql_text  waiters
 from  v$lock lb,
      v$lock lw,
      v$session sb,
      v$session sw,
      v$sql     qb,
      v$sql     qw
 where lb.sid=sb.sid
 and  lw.sid=sw.sid
 and  sb.prev_sql_addr=qb.address
 and  sw.sql_address=qw.address
 and  lb.id1=lw.id1
 and  sw.lockwait is not null
 and  sb.lockwait is null
 and  lb.block=1 ;

2、查看被锁的表 

 select   p.spid,a.serial#,c.object_name,b.session_id,b.oracle_username,b.os_user_name
 from   v$process  p,v$session   a,  v$locked_object   b,all_objects  c
  where  p.addr=a.paddr   and  a.process=b.process   and  c.object_id=b.object_id ;

3、查看那个用户那个进程照成死锁，锁www.2cto.com的级别

 select b.owner,b.object_name,l.session_id,l.locked_mode fromv$locked_object l, dba_objects b whereb.object_id=l.object_id;

4、查看连接的进程 

 SELECT sid, serial#, username, osuser FROMv$session;

5、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;

6、杀掉进程 

 alter   system    kill   session  'sid,serial#';

        sid是第5步查询出的sid和serid