Species Revenue Classifications:Group Species by Total Revenue into Five Spending Tiers
Intermediate
Rank species into 5 tiers based on total spending at Xorthax's post.
Xorthax wants to rank different species into 5 tiers based on their total revenue at his trading post. Write a query to assign tiers to species based on their total spending.
Write Your Query
Answer:
select c.species,
sum(o.totalamount) as totalrevenue,
ntile(5) over (
order by sum(o.totalamount) desc) as revenuetier
from orders o
join customers c on o.customerid = c.customerid
group by c.species;
Explanation:
It represents customer segmentation where businesses classify demographic groups or categories by total spending to identify top contributors.
You’ll practice summarizing and dividing aggregated results into ranked tiers for revenue-based performance analysis.
This problem is labeled as Intermediate. It assumes you’ve written a few window function queries before, but you don’t need to be an expert. Use the hints and explanations if you get stuck — they’re there to help you think through the logic.
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