多项选择题
A.You can perform consistent backups only.
B.You can perform a complete database backup without shutting down the database instance.
C.You can back up data files only when all data files have the same SCN recorded in the control file.
D.You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.
多项选择题 You are managing an Oracle Database 11g database. The database is open， and you plan to performRecovery Manager （RMAN） backups. Which three statements are true about these backups（）
单项选择题 You executed the following command to perform a backup of the USERS tablespace： SQL> ALTER TABLESPACE users BEGIN BACKUP； ALTER TABLESPACE users BEGIN BACKUP * ERROR at line 1： ORA-01123： cannot start online backup； media recovery not enabled What could be the reason for this error（）
单项选择题 WhichstatementistrueaboutawholeconsistentdatabasebackuponadatabaserunninginARCHIVELOGmode（）