| Oracle® Database Reference 11g Release 1 (11.1) Part Number B28320-01  | 
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V$FLASHBACK_DATABASE_LOG displays information about the flashback data. Use this view to help estimate the amount of flashback space required for the current workload.
| Column | Datatype | Description | 
|---|---|---|
OLDEST_FLASHBACK_SCN | 
NUMBER | 
Lowest system change number (SCN) in the flashback data, for any incarnation | 
OLDEST_FLASHBACK_TIME | 
DATE | 
Time of the lowest SCN in the flashback data, for any incarnation | 
RETENTION_TARGET | 
NUMBER | 
Target retention time (in minutes) | 
FLASHBACK_SIZE | 
NUMBER | 
Current size (in bytes) of the flashback data | 
ESTIMATED_FLASHBACK_SIZE | 
NUMBER | 
Estimated size of flashback data needed for the current target retention |