383.At the request of a user, you issue the following command to restore a dropped table: flashback table
"BIN$F2JFfMq8Q5unbC0ceE9eJg==$0" to before drop; Later, the user notifies you that the data in the
table seems to be very old and out of date.
What might be the problem?
A. Because a proper range of SCNs was not specified, the wrong data was restored.
B. A proper range of timestamps was not specified, so the wrong data was restored.
C. A previous Flashback Drop operation had been performed, resulting in multiple versions of the table
being stored in the Recycle Bin.
D. Either option A or B could be correct. Not enough information was provided to determine which.
E. None of the above.
Answer: C
答案解析：
参考：http://blog.csdn.net/rlhua/article/details/12407737
使用FLASHBACK TABLE ... TO BEFORE DROP命令从回收站恢复表及其所有可能的从属对象。
但有可能在回收站里表有多个版本。如题，用户使用flashback table
"BIN$F2JFfMq8Q5unbC0ceE9eJg==$0" to before drop;来恢复表，但数据太旧，即恢复了旧版本的数据。
如果要恢复最新数据的，则 dba_recyclebin表的droptime来确定需要恢复的时间点。