Beginning Oracle Database 11g Administration From Novice to Professional

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CHAPTER 13 RECOVERY
Flashback Data Archive
This feature was introduced in Oracle Database 11g. An archive can be created to store
all changes made to data rows during the lifetime of a table. The archive is not dependent
on the undo segments and, consequently, its contents are not lost if the information in the
undo segments is overwritten by new transactions. A complete discussion is outside the
scope of this chapter.
Flashback Database
The biggest weapon in the armory of flashback features is the command.
For example, let’s suppose that major changes are being made to the database.
You need to simply create a restore point by using the command. If
the changes need to be tested and test data created before releasing the database to the
users, you could simply create a second restore point. If the testing is successful, the test
data can be completely erased by reverting to the second restore point, and the database
can then be released to the users. If the testing is unsuccessful, you can simply revert to
the first restore point to wipe out all traces of your changes.
The use of the command requires that the database be shut down
and then brought into the state. After the command has completed, the database
must be opened with the option. All this can be most simply accomplished
from the User Directed Recovery section of the Perform Recovery page of Enterprise
Manager, shown in Figure 13-1.