You need to maintain a record of all transactions on some tables for at least three years. Automatic undo management is enabled for the database.
What must you do accomplish this task?
A. Enable supplemental logging for the database.
B. Specify undo retention guarantee for the database
C. Create Flashback Data Archive in the tablespace where the tables are stored.
D. Create Flashback Data Archive and enable Flashback Data Archive for specific tables
此题考点为闪回数据归档的使用场景。因为要保留某表上 3 年以上的记录，可以使用闪回数据归档， 这样会记录指定时间的变化信息。可以闪回表到时间窗口的任意一点。
A,B 明显错误。闪回数据归档是使用另外专门的表空间来存放归档信息，C 错，D 对。