Your question is Explain Subqueries in Customer Analytics. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
At companies like Stripe or Airbnb, analysts often need to answer questions that depend on intermediate results, such as finding customers above average spend or products with the highest sales. Subqueries are one of the core SQL tools for solving these problems.
Explain what a subquery is in SQL and how it works. In your answer, cover:
Keep the explanation at an interview-ready level. The interviewer is not looking for database internals, but they do expect clear definitions, practical examples, and an understanding of when subqueries are the right tool versus when another approach may be better.