Enforce uniqueness and define foreign key constraint from multiple tables?

I don't think it's a great idea to let user privileges dictate your schema but if you have to then I think the idea mentioned by HerpaMoTeH is a good one. A third table with id, gender and with the id used as an FK in the gender specific tables and student_class.

This is why attribute splitting is bad - it starts "infecting" the other tables in odd ways.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.