1.查询是否锁表
SELECT l.session_id sid, s.serial#, l.locked_mode,l.oracle_username,
l.os_user_name,s.machine, s.terminal, o.object_name, s.logon_time
FROM v$locked_object l, all_objects o, v$session s
WHERE l.object_id = o.object_id
AND l.session_id = s.sid
and oracle_username = '用户名' --用户名要大写
ORDER BY sid, s.serial#
2.解锁
ALTER system KILL session 'SID,serial#'