80th Percentile API Latency

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 performance engineering team is setting SLO thresholds for the API gateway. They need the latency value at the 80th percentile across all recorded API calls. Return a single value representing that threshold.

Summary

The 80th percentile tells the real story.

Practice This Problem

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