Which are the prerequisites for performing flashback transactions on your database？（）<br>A: Undo retention guarantee for the database must be configured.<br>B: Supplemental log must be enabled for the primary key.<br>C: Supplemental log must be enabled.<br>D: Execute permission on the DBMS_FLASHBACK package must be granted to the user.

Which are the prerequisites for performing flashback transactions on your database？（）
A: Undo retention guarantee for the database must be configured.
B: Supplemental log must be enabled for the primary key.
C: Supplemental log must be enabled.
D: Execute permission on the DBMS_FLASHBACK package must be granted to the user.

出自：Oracle认证

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