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Schema-based backups

Can you please explain about schema-based backups? Does it mean all objects in a particular user schema can be backed up? Does the user need to be logged out or without any active sessions for this backup?

The only way in Oracle to do a "schema based backup" is with the export utility and the "OWNER=" parameter. This will dump the entire schema's contents to a dump file. The user does not have to be logged out for this to occur. Keep in mind, that export files cannot be used for rolling forward after the backup has occurred. You will only be able to restore from the dump file, up to the point in time that you took the dump.

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