1、Which two circumstances could require an incomplete recovery? (Choose two.)
A.You need to restore a damaged mirrored archived redo log file.
B. A previously unused mirrored copy of a lost control file has been
restored.
C. You need to reverse the mass update of a significant number of
tables and are unsure when the error occurred.
D.A damaged control file has been restored from backup, and a binary
version of the restored control file does NOT exist.
E.You need to recover to a previous point-in-time before there were a
number of significant structural changes made to the database that
need to be reversed.
应该还是C、E 吧。
SG 上提到Reason for Performing Incomplete Recovery 时，包括有：
All control files are lost.
User error （An important table was dropped 和Invalid data was committed in a table）
同时，提到Type of Incomplete Recovery 时，有Timed-based、Cancel-based、Change-based
但是在说到对于All control files are lost 情况下的原因时，提到but you have a backup of an old binary copy.
