多项选择题
Which of these are valid Flashback Database recovery point parameters？（）
A. SCN B. Timestamp C. Named recovery point D. Transaction ID E. Session ID
单项选择题 The（）writestheFlashbackDatabaselogsintheflashrecoveryarea.
单项选择题 FlashbackDatabasereliesonwhichtechnologiestorecovertoapointintime？（）
多项选择题 Which method could be utilized to identify both DML operations and the SQL statements needed to undo those operations for a specific schema owner？（）
