多选题What are the prerequisites for enabling Flashback Database？ （）AThe database must be started in the MOUNT EXCLUSIVE state.BThe database must have multiplexed control files.CThe database must be opened by using a text-based parameter file instead of a server parameter file （SPFILE）.DThe database must be in ARCHIVELOG mode.EThe database must be in the NOMOUNT state.FThe database must be opened in RESTRICTED mode.
多选题
What are the prerequisites for enabling Flashback Database？ （）
A
The database must be started in the MOUNT EXCLUSIVE state.
B
The database must have multiplexed control files.
C
The database must be opened by using a text-based parameter file instead of a server parameter file （SPFILE）.
D
The database must be in ARCHIVELOG mode.
E
The database must be in the NOMOUNT state.
F
The database must be opened in RESTRICTED mode.
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