Welcome to your interview.
The question is on your right: Rolling 30-Day Customer Average. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Given a raw transaction table and a customer master table, write a SQL query to find the rolling 30-day average transaction volume per customer at Prudential.