oracle查看被锁的表和解锁...

--以下几个为相关表
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;

--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;

--查看那个用户那个进程照成死锁
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;

--查看连接的进程 
SELECT sid, serial#, username, osuser FROM v$session;

--3.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。

--杀掉进程 sid,serial#
alter system kill session'210,11562';
 
--批量杀死锁

declare cursor mycur is    
select b.sid,b.serial#    
from v$locked_object a,v$session b    
where a.session_id = b.sid group by b.sid,b.serial#;    
    
    
begin    
  for cur in mycur    
    loop      
     execute immediate ( 'alter system  kill session  '''||cur.sid || ','|| cur.SERIAL# ||''' ');    
     end loop;    
    
end;   
--查看死锁
select /* + rule */ lpad(' ',decode(l.xidusn,0,3,0))||l.oracle_username User_name,
 
o.owner,o.object_name,o.object_type,s.sid,s.serial#,p.spid
from v$locked_object l,dba_objects o,v$session s,v$process p 
where l.object_id=o.object_id
and l.session_id=s.sid
and s.paddr = p.addr 
order by o.object_id,xidusn DESC;

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