620.You are using the control file to maintain information about the database backups that are being performed by Recovery Manager (RMAN).
Identify two scenarios is which you must have a recovery catalog. (Choose two.)
A. To store the backup information of multiple database
B. To restrict the amount of space that is used by the backups
C. To maintain a backup for a certain time is set by the CONTROL_FILE_RECORD_KEEP_TIME parameter.
D. To list the data files that were in a target database at a given time by using the AT option of REPORT SCHEMA command.
Answer: AD
参考：http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta2006.htm#RCMR
题意是比较控制文件和RMAN恢复目录，指出二个只能使用恢复目录的场景：
1、恢复目录可以存储多个数据库的备份信息；
2、通过使用报表架构命令的选项来列出在给定时间内的目标数据库中的数据文件。
Identify two scenarios is which you must have a recovery catalog. (Choose two.)
A. To store the backup information of multiple database
B. To restrict the amount of space that is used by the backups
C. To maintain a backup for a certain time is set by the CONTROL_FILE_RECORD_KEEP_TIME parameter.
D. To list the data files that were in a target database at a given time by using the AT option of REPORT SCHEMA command.
Answer: AD
参考：http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta2006.htm#RCMR
题意是比较控制文件和RMAN恢复目录，指出二个只能使用恢复目录的场景：
1、恢复目录可以存储多个数据库的备份信息；
2、通过使用报表架构命令的选项来列出在给定时间内的目标数据库中的数据文件。
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/81227/viewspace-2120824/ ，如需转载，请注明出处，否则将追究法律责任。
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