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You perform a backup using the following BACKUP command: RMAN> BACKUP AS COMPRESSED BACKUPSET DATABASE; Which statement is true of this command?（）
A:A different procedure is required to restore a database from compressed backups
B:The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.
C:Using this command to create backups minimizes the bandwidth consumed
D:Using this command to create backups improves the performance of the backup process

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出自：Oracle认证

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