Welcome to your interview.
The question is on your right: SQL Joins and Duplicate Detection. 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.
Explain the difference between an inner join, left join, and outer join in SQL, and write a query to find duplicate records in a table.