How should I join these 3 SQL queries in Oracle?

I guess I don't see the problem with having several GroupBy columns. That's a very common pattern in SQL. Of course, code clarity is often in the eye of the beholder.

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.