Consider the following command： Backup database plus archivelog delete input； How many backup sets would be created by this command if the following were true：（） Control-file a NN uto backups were enabled. NN The size of backup sets was not restricted. NN One channel was allocated.
- A、 1
- B、 2
- C、 3
- D、 4
- E、 5
正确答案:D
答案解析:有
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