Duplicate DQ Check Records
A medium SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L3
Interview Prompt
A downstream team reported that some entries in the data quality checks table appear more than once for the same table and column combination. Surface any table-and-column pairs that have multiple records, along with the duplicate count.
Summary
Passed QA twice. That's the problem.
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