You performed the RMAN database backup having a backupset key number 231 with the KEEP FOREVER option. After some days， you want to change the status of the database backup and you issued the following command： RMAN>CHANGE BACKUPSET 231 NOKEEP； What is the implication of this command？（）<br>A: The backup is deleted.<br>B: The backup is marked unavailable.<br>C: The backup overrides the backup retention policy.<br>D: the backup becomes eligible for deletion according to the existing retention policy.

You performed the RMAN database backup having a backupset key number 231 with the KEEP FOREVER option. After some days， you want to change the status of the database backup and you issued the following command： RMAN>CHANGE BACKUPSET 231 NOKEEP； What is the implication of this command？（）
A: The backup is deleted.
B: The backup is marked unavailable.
C: The backup overrides the backup retention policy.
D: the backup becomes eligible for deletion according to the existing retention policy.

出自：Oracle认证

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