Oracle认证考试单项选择题每日一练(2019.08.15)

The user SCOTT who is the owner of ORDERS and ORDERJTEMS tables issues the following 
GRANT command： 
GRANT ALL  
ON orders， order_items  
TO PUBLIC；  
What correction needs to be done to the above statement？ （）

In Recovery Manager (RMAN), you are taking image copies of the data files of your production database and rolling them forward at regular intervals. You attempt to restart your database. After a regular maintenance task, you realize that one of the data files that belongs to the USERS tablespace is damaged and you need to recover the data file by using the image copy. Because a media failure caused the data file to be damaged, you want to place the d ata file in a different location while restoring the file.
Which option must you consider for this task?（）