Species Revenue Leaderboard :Compare Species by Total Revenue to Identify Top-Earning Groups Advanced
Find out which species are Xorthax's most valuable patrons by revenue.
The merchants guild of Zlacksys 19 wants to identify the species generating the most revenue for Xorthax. Write a query to rank species based on their total revenue at the trading post.
Write Your Query
It reflects business intelligence reporting where customer groups or demographics are ranked by their contribution to total revenue.
You’ll explore methods for summarizing and ranking grouped data to compare performance across categories.
This problem is labeled as Advanced. It’s intended for learners who are already comfortable with common window functions and want to push into more complex analytical patterns. Don’t rush — work through the hints one at a time and study the final query structure carefully.
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SQL Cookbook (O’Reilly)
Practical SQL recipes for real-world querying—great complement to hands-on practice.
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