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A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L4
Interview Prompt
Our data quality system appends a new row every time it runs a check against a table. For each table, return the rule from its most recent check, when that check ran, and how many different calendar months the table has been checked in.
Summary
Every table keeps a record. Only the latest verdict still speaks.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision