How to join the results of two subqueries in PostgreSQL?

You will not be able to use the distinct keyword, as you actually want to select also the contact_id from the all_calls table. Instead, you will need to use one of the aggregate functions to select a single contact_id for each distinct phone number.

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.