多选题Which two statements regarding the Flashback Table feature are correct?（）AFlashback Table can be performed on system tables.BFlashback Table operation does not shrink the segments.CFlashback Table uses log mining to extract SQL_REDO and SQL_UNDO statem
题目
多选题
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.