oracle表是否被鎖定

select t2.username,t2.sid,t2.serial#,t2.logon_time

from v$locked_object t1,v$session t2

where t1.session_id=t2.sid  

order by t2.logon_time;

--查死鎖--

select sess.sid,sess.serial#, lo.oracle_username,lo.os_user_name,ao.object_name,lo.locked_mode

from v$locked_object lo,dba_objects ao,v$session sess

where ao.object_id = lo.object_id

and lo.session_id = sess.sid

--查死鎖--

Select decode(request, 0, 'holder:', 'waiter:') || sid sid,id1,id2,lmode,request,type,ctime/60 鎖定時(shí)間

  from v$lock where (id1, id2, type) in

       (select id1, id2, type from v$lock where request > 0) order by id1, request;

--根據(jù)sid獲取進(jìn)程詳情--

SELECT a.username,a.machine,a.program,b.spid,a.sid,a.serial#,a.status,c.piece,c.sql_text

  FROM v$session a, v$process b, v$sqltext c

 WHERE a.sid = '749'

   AND b.addr = a.paddr

   AND a.sql_address = c.address(+)

 ORDER BY c.piece;

-- add 2012-09-14

-- 數(shù)據(jù)表死鎖的解決方法（轉(zhuǎn)）

死鎖是數(shù)據(jù)庫(kù)經(jīng)常發(fā)生的問題，數(shù)據(jù)庫(kù)一般不會(huì)無(wú)緣無(wú)故產(chǎn)生死鎖，死鎖通常都是由于我們應(yīng)用程序的設(shè)計(jì)本身造成的。產(chǎn)生死鎖時(shí)，如何解決呢，下面是常規(guī)的解決辦法：

1）執(zhí)行下面SQL，先查看哪些表被鎖住了: 
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;

2）查處引起死鎖的會(huì)話
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;
這里會(huì)列出SID

3） 查出SID和SERIAL#： 
查V$SESSION視圖: 
SELECT SID,SERIAL#,PADDR FROM V$SESSION WHERE SID='剛才查到的SID'; 
這一步將得到PADDR 

4）查V$PROCESS視圖: 
SELECT SPID FROM V$PROCESS WHERE ADDR='剛才查到的PADDR'; 
這一步得到SPID 

5）殺死進(jìn)程 
(1)在數(shù)據(jù)庫(kù)中，殺掉ORACLE進(jìn)程: 
ALTER SYSTEM KILL SESSION '查出的SID,查出的SERIAL#'; 

(2)如果在ORACLE中不能殺死進(jìn)程，我們只能到操作系統(tǒng)中，使用操作系統(tǒng)命令殺死進(jìn)程 
KILL -9  “剛才查出的SPID”
在WINDOWS平臺(tái)，可以是偶那個(gè)orakill。