Youexecutedthefollowingqueryinyourdatabase:SELECToldest_flashback_scn,oldest_flashback_timeFROMV$FLA

17 查阅

A.Thetimewhenthelastflashbackoperationinyourdatabasewasperformed.

B.Thetimewhenthefirstflashbackoperationinyourdatabasewasperformed.

C.AlistofflashbackoperationsperformedinyourdatabaseusingSCNandtime.

D.Theapproximatetimeandthelowestsystemchangenumber(SCN)towhichyoucanflashbackyourdatabase.

参考答案:

参考D

计算机考试