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.
About SQL Habit
Hi, it’s Anatoli, the author of SQL Habit.
SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst and solve real-life challenges from Business, Marketing, and Product Management.
SQL Habit course is made of bite-sized lessons (you’re looking at one atm) and exercises. They always have a real-life setting and detailed explanations. You can immediately apply everything you’ve learned at work.