Oracle의 flashback 기능

이런 기능이 있군요..

http://niflheim.tistory.com/52

SELECT * FROM employees AS OF TIMESTAMP
TO_TIMESTAMP('2004-04-04 09:30:00', 'YYYY-MM-DD HH:MI:SS')
WHERE last_name = 'Chung';

예제: http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14251/adfns_flashback.htm#sthref1460