-- (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)查看是哪个sql引起的
select b.username,c.* from v$locked_object a,v$session b,v$sql c 
where a.session_id = b.sid
and b.sql_ID = c.sql_id and c.sql_id = ''
order by b.logon_time;

--(5)杀掉对应进程
alter system kill session'1025,41';
--其中1025为sid,41为serial#.