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You are using RMAN to perform a closed database backup of your database. You issue these RMAN commands： STARTUP MOUNT； BACKUP  FORMAT ’/BACKUP/df_%d_%s_%p.bus’  DATABASE filesperset = 2；  Which components are included in the backup？（）
A:Only the data files.
B:Only the data files and the online logs.
C:The data files， control files， and the online logs.
D:The data files and control files， but not the online logs.

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出自：Oracle认证

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