单项选择题 On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30 am. Which option must you use to check whether a flashback operation can recover the database to the specified time? ()
多项选择题 You need to perform a block media recovery on the tools01.dbf data file in the SALES database by using Recovery Manager (RMAN).Which two are the prerequisites to perform this operation?()
多项选择题 Examine the following command that is used to duplicate a database on the same host: Which two statements describe the effect after the database is duplicated successfully? ()