题目内容

下面（）不属于CNC装置的基本功能。

A. 主轴功能
B. 进给功能
C. 准备功能
D. 图形显示功能

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Which method would you use to undo the changes made by a particular transaction without affecting the changes made by other transactions？（）

A. point-in-time recovery
B. execute the ROLLBACK command with transaction number
C. flashback the database to before the transaction was committed
D. determine all the necessary undo SQL statements from FLASHBACK_TRANSACTION_QUERY and use them for recovery

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