试题详情
- 单项选择题 You are working on a 24X7 database. You want to design a backup strategy for your database that uses user managed backups. You want to be able to perform all backups while the database remains online. Which statement about performing user-managed backups in a 24x7 environment is true？（）
A、 You must have change tracking enabled in your database
B、 Your database must be running in NOARCHIVELOG mode
C、 To back up a tablespace，it must be in backup mode
D、 To back up a tablespace，it must first be taken offline
- C
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