查询锁：

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

　　ORDER BY sid, s.serial# ;

杀锁：

ALTER system KILL session '250,648';