The Usual Suspects

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

Domain

SQL

Difficulty

hard

Seniority

L4

Problem

Which services had the most health checks in 2025? Show each qualifying service and its 2025 check count, including ties.

Summary

Same services, same checks, same problems.

Practice This Problem

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