-- 查看是否被锁表
select a.object_name,b.session_id,c.serial#,c.program,c.username,c.command,c.machine,c.lockwait
from all_objects a,v$locked_object b,v$session c where a.object_id=b.object_id and c.sid=b.session_id;
-- 查询锁表原因
select l.session_id sid, s.serial#, l.locked_mode, l.oracle_username, s.user#, l.os_user_name, s.machine, s.terminal, a.sql_text, a.action
from v$sqlarea a, v$session s, v$locked_object l
where l.session_id = s.sid and s.prev_sql_addr = a.address
order by sid, s.serial#;
-- 解锁方法 191--sid 19895--serial#
alter system kill session '191,19895';