What is the purpose of the until change option of the restore command?
A. It allows you to select the SCN that you want to restore to.
B. It allows you to select the log sequence number you want to restore to.
C. It allows you to select the timestamp you want to restore to.
D. It allows you to manually stop the restore at any time as online redo logs are applied.
E. None of the above.
The until change option of the restore command provides the ability to restore the
database to a specific SCN.
原文：http://www.cnblogs.com/Babylon/p/7794210.html