You can use Or
题目
You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback？（）
- A、Oracle Flashback uses undo information to construct consistent data.
- B、You can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session.
- C、You can only use Oracle Flashback view of the data if the required records are still in the online redo log files.
- D、Oracle Flashback lists the DML that was executed during the period you identify when initiating your session.
