To enable faster incremental backups, you enabled block change tracking for the database. Which two statements are true about the block change tracking file?()
- A、 Multiple change tracking files can be created for a database.
- B、 The change tracking file must be created after the first level 0 backup.
- C、 RMAN does not support backup and recovery of the change tracking file.
- D、 The database clears the change tracking file and starts tracking changes again,after whole database restore and recovery operations.
正确答案:C,D
答案解析:有

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