QuerydrillTop two per category
An SQL exercise from Querydrill. Solve it with a SQL editor in your browser, checked on the rows it returns and again on changed data, and it is checked the moment you submit.
The task
For each category, return the category, product name and revenue (quantity times price) of its two best-selling products by revenue.
What this exercise teaches
Top-N per group: aggregate, rank with PARTITION BY, filter on the rank.
A hint if you get stuck
Revenue per product in a CTE, rank inside each category, keep ranks 1 and 2.
This exercise is part of Pro
Pro unlocks all 60 exercises, with worked solutions and progress saved to your account. The free exercises work without an account.
You create a free account first, so Pro is attached to it.
Monthly is charged today and then every month until you cancel, in one click from your account page. Lifetime is one payment with no renewals. Full refund within 14 days of paying.