Which two statements regarding the Flashback Table feature are correct?（）
- A、Flashback Table can be performed on system tables.
- B、Flashback Table operation does not shrink the segments.
- C、Flashback Table uses log mining to extract SQL_REDO and SQL_UNDO statements.
- D、Flashback Table operation acquires exclusive data manipulation language (DML) locks.
正确答案:B,D
答案解析:有
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