Lesson 4 of 10 · 8 min · 2 hands-on steps

Counting & Summarizing (Aggregates)

COUNT, SUM, AVG, MIN and MAX turn many rows into one answer.

You're on a roll. Keep going!

Unlock every lesson, exercise and interview question, plus the AI tutor. From $9.99/month, cancel anytime, with a 14-day money-back guarantee.