246. Notes on anomaly detection

This lesson is based on theLive dataset.

An SQL alert is an entry-level technique of anomaly detection. Anomaly detection is a whole world of different algorithms and it deserves a course of its own.

In this chapter, we’ve looked at a couple effective techniques to detect anomalies with a simple SQL query: comparing a number of events (errors/signups/etc) to 0 or its average value already tells us a lot about health of our systems. Remember 80/20 rule – most of the time it’s more than enough to start with SQL alerts for spotting critical problems in our processes and data.

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Anatoli Makarevich, author of SQL Habit About SQL Habit

Hi, it’s Anatoli, the author of SQL Habit. 👋

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