The redo log is then used to re-apply changes since the time that block was copied to the flashback logs. Then, if you later need to use Flashback Database, Flashback Table, or point-in-time recovery, you can refer to the target time using the name of the restore point instead of a time expression or SCN. From that time on, at regular intervals, the database copies images of each altered block in every datafile into the flashback logs. To enable Flashback Database, you set up a flash recovery area, and set a flashback retention target , to specify how far back into the past you want to be able to restore your database with Flashback Database. Restore points and Flashback Database can be used independently of each other or together. Flashback Database can be used to reverse most unwanted changes to a database, as long as the datafiles are intact.
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