The Galactic Max Order Hunt :Identify Each Customer’s Maximum Order Value Sorted by Date Intermediate
Discover each customer's largest single order; sorted by time.
Xorthax wants to compare every order with the largest order amount placed by that customer. Show each order with the customer’s maximum totalamount, ordered by customerid, ordertimestamp, then orderid.
Write Your Query
This reflects analyzing customer purchasing behavior to find the biggest individual transactions over time.
You will practice calculating maximum values within groups and presenting them alongside chronological order details.
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.
Yes. Every problem comes with optional hints you can reveal one at a time, plus a fully worked step-by-step solution. You decide how much help you want while practicing.
All problems on PracticeWindowFunctions.com are completely free and can be solved without creating an account. Right now there are over 80 practice problems, with new ones added regularly.