Customer Spending, Averaged and Analyzed:Calculate Average Order Value Per Customer for Spending Insights
Intermediate
Compare every order to the customer's average; no hyperspace math required.
Xorthax wants to understand the spending habits of his intergalactic customers. Calculate the average order value for each Customer ID at his trading post on Zlacksys 19. Include each individual order's ID and total amount value.
Write Your Query
Answer:
select customerid,
orderid,
totalamount,
avg(totalamount) over (partition by customerid) as averageordervalue
from orders;
Explanation:
This reflects analyzing customer purchase behavior to identify spending patterns and average order size.
You will practice calculating averages across groups and comparing individual records to group-level metrics.
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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