1.数据库表被锁后------解锁

第一步

select t2.username, t2.sid, serial#, t2.logon_time
from v$locke{d}_{o}bjectt1,v$session t2
where t1.SESSION_ID = t2.SID;

select t2.username, t2.sid, serial#, t2.logon_time
  from v$locked_object t1, v$session t2
 where t1.SESSION_ID = t2.SID;

第二步

alter system kill session ‘91,64898’;

2.查锁语句

select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode ,
machine,
program
from v$locke{d}_{o}bjectlo,db{a}_{o}bjectsao,v$session sess
where ao.object_id = lo.object_id and lo.session_id = sess.sid;

select sess.sid, 
    sess.serial#, 
    lo.oracle_username, 
    lo.os_user_name, 
    ao.object_name, 
    lo.locked_mode ,
    machine,
    program
    from v$locked_object lo, 
    dba_objects ao, 
    v$session sess 
where ao.object_id = lo.object_id and lo.session_id = sess.sid;