DataDriven
LearnPracticeInterviewDiscussDailyJobs

Create a formatted identifier for each user by combining their uppercase username, a dash, and their

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

Interview Prompt

Create a formatted identifier for each user by combining their uppercase username, a dash, and their user_id. Call it user_code.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your sql solution with real code execution
  4. Get instant feedback and a hire/no-hire decision

Related

  • All Mock Interviews
  • Practice Mode (untimed)
  • SQL Interview Questions
  • Data Engineering Interview Prep Guide
  • Practice Problems
  • Daily Challenge