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select timestamp_to_scn(to_timestamp(‘2015-05-12 12:40:00‘,‘YYYY-MM-DD hh24:MI:SS‘)) from dual;
select dbms_flashback.get_system_change_number from dual;
select o.* from (
select * from orders as of scn 107080891
) o left join users u
on o.userpk = u.pk
where u.uniqueid = ‘ls13523105066@126.com‘
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原文地址:http://my.oschina.net/soonlive/blog/413821