99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

單項選擇題

In which scenario is a Database Administrator NOT required to perform an incomplete recovery?()

A. when all the online redo log groups are multiplexed and one of the members of a group is missing
B. when all the online redo log groups are not multiplexed and one log group is missing
C. when all the control files are missing
D. when some important tables are deleted from the database and purged from the Recycle Bin

微信掃碼免費搜題