"Never mind" is an expression that has the same meaning as "much less", "let alone" or "not to mention". My dictionary says that it is used in negative contexts to add to one term another denoting something less likely. (Example: With this knee I can hardly walk, never mind run)
In Japanese it would be translated as 〜どころか〜も、〜はもちろん〜も、まして〜ない、なおさら〜ない.
I would translate the phrase in question as follows:
データベース内の各ビューに対して１度ずつ行う場合はなおさらだ。