Services With Multi-Quarter Uptime

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

Domain

SQL

Difficulty

hard

Seniority

L4

Problem

The SRE team considers a service stable only if it recorded healthy checks across multiple quarters. Find services that had at least one healthy check (case-insensitive) in at least two separate quarters of 2026.

Summary

Multi-quarter uptime streaks.

Practice This Problem

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