多项选择题
A.The backups would be consistent.
B.The backups would be inconsistent.
C.The backups would be possible only if the database is running in ARCHIVELOG mode.
D.The backups would be possible only if the database is running in NOARCHIVELOG mode.
E.The backups need to be restored and the database has to be recovered in case of a media failure
单项选择题 In your production database， data manipulation language （DML） operations are executed on the SALES table.You have noticed some dubious values in the SALES table during the last few days. You are able to track users， actions taken， and the time of the action for this particular period but the changes in data are not tracked.You decide to keep track of both the old data and new data in the table along with the user information. Whataction would you take to achieve this task（）
单项选择题 The job to gather optimizer statistics for objects runs as part of the automatic maintenance window in yourdatabase instance. At a certain point of time， the maintenance window closes before the statistics are gatheredfor all objects. Which statement is true in this scenario（）
多项选择题 WhichtwostatementsaretrueregardingB-treeindexs（）