349.What is the result of this command? RMAN> Report need backup days 3;
A. Lists all datafiles created in the last three days that are not backed up.
B. Lists all datafiles not recoverable based on the current retention criteria.
C. Lists all datafiles not backed up in the last three days. The datafile is not recoverable.
D. Lists all datafiles that need to be backed up due to unrecoverable operations.
E. Lists all datafiles not backed up in the last three days. It does not imply that the datafile is not
recoverable.
Answer: E
答案解析：
Report need backup days 3;
列出3天以前的可用于恢复的归档日志的数据文件。即该数据文件在3天内没有备份过。但并不是说数据文件是不能恢复的。
RMAN> REPORT NEED BACKUP days 3;
using target database control file instead of recovery catalog
Report of files whose recovery needs more than 3 days of archived logs
File Days Name
---- ----- -----------------------------------------------------