From users, return user_id and a column greeting built by concatenating 'Hello, ' with username and

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

From users, return user_id and a column greeting built by concatenating 'Hello, ' with username and '!'. Use CONCAT. Order by user_id ascending.

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