单选题

Examine the following RMAN script: RMAN> run { debug on; allocate channel c1 type disk; backup datafile 5; } Which statement describes the purpose of the script?（）

发布日期：2020-04-10

The data file is checked for physical corruption and backed up if found clean.

The backup of data file 5 is performed and the interactive messages during the backup are suppressed.

The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.

The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed

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