The Tag Order
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
- L3
Interview Prompt
The data quality team is standardizing event metadata. For all signup events, normalize the tags column to lowercase. Return the event ID and the normalized tags, ordered by event ID.
Summary
Tags arrived in chaos. The system needs them in line.
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