单选题
You executed the following query in your database： FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output？（）
发布日期：2020-04-10
the time when the last flashback operation in your database was performed
the time when the first flashback operation in your database was performed
a list of flashback operations performed in your database using SCN and time
the approximate time and the lowest system change number （SCN） to which you can flash back your database
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