Every Touch Counts

A medium SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.

Domain
SQL
Difficulty
medium
Seniority
junior

Interview Prompt

The vehicle auction marketplace wants each shopper's 2026 touchpoint total, most active first. A touchpoint is any row in `ad_impressions` or `search_queries`.

Summary

A bid, a click, a search: each one is a vote. Total them honestly.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write and run your SQL against a real database
  4. Answer the interviewer's follow-up questions, then get a hire or no-hire decision