Buried Digits
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
- L4
Interview Prompt
The release team wants to compare deploy versions as plain numbers, but each log records the version with a leading 'v' and dots or dashes between the parts, like 'v1.2-3'. The environment field was typed with inconsistent capitalization, and only the deploys whose environment is stored as the exact lowercase word 'staging' should count, so 'STAGING' and 'Staging' fall outside the set. For those rows, drop the 'v' and the dot and dash separators so the digits run together, and return that value as an integer beside the service name.
Summary
The version number is buried in the log.
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