查询锁定的表:
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
 ORDER BY sid, s.serial#;
解锁表:
ALTER system KILL session 'SID,serial#';