New Services With Poor Health

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

Domain

SQL

Difficulty

hard

Seniority

mid, senior

Problem

Find services whose earliest health check falls in Q1 2026 and where more than 20% of their checks have a non-healthy status (case-insensitive). Return the service name and the failure ratio.

Practice This Problem

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