单项选择题
A.The location can be changed only if the flash recovery area is empty.
B.After executing the command， all new flash recovery area files will be created in the new location.
C.The command will generate an error because you cannot change the flash recovery area while the database is open.
D.All the existing files in the flash recovery area will be moved to the new location， and all new Flash Recovery Area files will be created in the new location.
单项选择题 You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG What would you determine from the output？（）
单项选择题 You disabled the Flashback Database feature by using the following command： SQL> ALTER DATABASE FLASHBACK OFF What would be the effect of this command on the existing flashback logs？（）
单项选择题 InwhichcasewouldyouusetheFlashbackDatabasefeaturetoperformarecovery？（）