Drill 25: Make it smaller — Aggregation and GROUP BY
Write a smaller version of the example that keeps the core idea.
What you will be able to do
- Write a smaller version of the example that keeps the core idea.
Practice task
Write a smaller version of the example that keeps the core idea.
SELECT course_slug,
COUNT(*) AS total,
ROUND(AVG(minutes), 1) AS avg_minutes,
SUM(minutes) AS total_minutes
FROM lessons
WHERE level = 'Beginner'
GROUP BY course_slug
HAVING COUNT(*) >= 3
ORDER BY avg_minutes DESC;Your turn
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Write a smaller version of the example that keeps the core idea.
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