Vibe codingMediumvc-g103

Subject Ai code reviewLevel Mid–Senior~14 minCommon in Databases & SQL interviewsIndustries Software development

Question

An AI assistant produced this query for a dashboard showing the average rating per restaurant. Product reports that some restaurants show suspiciously high averages, and a few new restaurants are missing from the list entirely.

sql

1SELECT r.id, r.name, AVG(rev.rating) AS avg_rating, COUNT(*) AS review_count2FROM restaurants r3JOIN reviews rev ON rev.restaurant_id = r.id4WHERE rev.rating != 15GROUP BY r.id, r.name;

What are the data-correctness problems here?

What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

Learn the concepts

Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.