The Noise Floor

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

Domain

SQL

Difficulty

medium

Seniority

mid

Problem

A reliability team is separating the services that page on genuine emergencies from the ones that mostly cry wolf, where a real emergency means a critical-severity alert. For each service, report the share of its alerts that are high or critical, keep only the services where critical alerts are more than 80 percent of that high-or-critical volume, and list the loudest services first.

Summary

Not every alert deserves a 3 a.m. page. Find the services where most of them claim they do.

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