What methods of point-in-time recovery are available? (Choose all that apply.)
A. Change-based
B. Cancel-based
C. Time-based
D. Sequence number-based
E. Transaction number-based
Change-based application allows you to recover the database to a specific SCN.Cancel-based recovery provides the ability for you to cancel recovery after each archived redo log application.Time-based recovery provides the ability to recover the database up to a specific point in time.Sequence number-based recovery allows you to recover the data-base up to a specific log sequence number.
原文：http://www.cnblogs.com/Babylon/p/7805478.html