Sum of count of records in three related tables?

To answer your question, no. You cannot reference c.id inside the inline view aliased as x . That should throw an error.

You only need to use LEFT JOIN on course against student because it is impossible for a teacher to teach on students that have no courses.

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.