--(1)锁表查询的代码有以下的形式： 
select count(*) from v$locked_object; 
select * from v$locked_object; 
--(2)查看哪个表被锁 
select b.owner,b.object_name,a.session_id,a.locked_mode from v$locked_object a,dba_objects b where b.object_id = a.object_id; 
--(3)查看是哪个session引起的 
select b.username,b.sid,b.serial#,logon_time from v$locked_object a,v$session b where a.session_id = b.sid order by b.logon_time; 
--(4)杀掉对应进程 
alter system kill session '1025,41'; 
--其中1025为sid,41为serial#.