多项选择题
A. Make backups faster
B. Store RMAN metadata
C. Store RMAN scripts
D. Provide the ability to do centralized backup reporting
E. Make recovery faster
单项选择题 A shoot-out has erupted between your MS development teams using .NET and your Linux development teams using Java. Knowing that your database is in danger，which command would you use to back up your NOARCHIVELOG mode database using RMAN with compression？（）
单项选择题 WhichRMANbackupcommandisusedtocreatetheblock-changetrackingfile？（）
单项选择题 WhichofthefollowingRMANstructurescandatafromadatafilespan？（）