Which two are true about Oracle Flashback features? (Choose two.)
A.FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVE D REDO LOG files. B.FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVE D REDO LOG files. C.FLASHBACK TABLE can undrop a column. D.FLASHBACK DROP can undrop an index when undropping a table. E.After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.正确答案DE
