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()
- A、The MTTR Advisor is disabled.
- B、The database is in NOARCHIVELOG mode.
- C、The tablespace is already in backup mode.
- D、The Flash Recovery Area is not configured.
正确答案:B
答案解析:有

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