Build Health

A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

medium

Seniority

L4

Problem

The platform team wants a CI health leaderboard for the all-hands. Rank repositories in `ci_builds` by success rate, where rate is measured against every build the repo ran (not just builds that resolved to success or failed). Ignore repos that haven't built enough to be meaningful.

Summary

Rank every repo by how often CI stays green.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and grades it automatically.