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     select t1.sid, t1.serial#, t1.username, t1.logon_time
     from v$session t1 , v$locked_object t2
     where t1.sid = t2.session_id
     order by t1.logon_time
2. ͨ¹ýalter system kill session 'sid, serial#'°Ñsession killµô
     alter system kill session '6,8'


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2.alter user testa default tablespace users temporary tablespace temp;
3.grant connect to testa;
4.grant select any table to testa;
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