Smooth Latency

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

Domain

SQL

Difficulty

medium

Problem

The SRE team wants to spot latency trends per endpoint over time. For every row in api_calls with a non-NULL latency, compute a running average of latency within that endpoint ordered by call_time, covering every call at or before this one. Return the endpoint, latency, and running average.

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