Drill 19: Predict the output — Views and stored procedures
Describe the output you expect and how you would check it.
What you will be able to do
- Describe the output you expect and how you would check it.
Practice task
Describe the output you expect and how you would check it.
CREATE VIEW course_totals AS
SELECT c.slug, c.title, COUNT(l.id) AS lessons, COALESCE(SUM(l.minutes), 0) AS minutes
FROM courses c
LEFT JOIN lessons l ON l.course_slug = c.slug
GROUP BY c.id, c.slug, c.title;
SELECT * FROM course_totals ORDER BY minutes DESC;Your turn
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Describe the output you expect and how you would check it.
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