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You performed the RMAN database backup with the KEEP option. Which two statements are true regarding this backup？（）
A: The backup contains data files， the server parameter file，and the control file even if the control file  autobackup is disabled.
B: The KEEP option overrides the configured retention policy.
C: The backup contains only data files and archived redo log files.
D: The KEEP option is an attribute of an individual backup piece.

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出自：Oracle认证

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