Do I need advanced SQL to attempt this?

This problem is labeled as Intermediate. You don’t need to be an expert, only comfortable with SQL and willing to experiment. If you get stuck, the hints and solution will help you along.

Will I get hints and step-by-step explanations if I get stuck?

Yes. Every problem comes with optional hints you can reveal one at a time, plus a fully worked step-by-step solution. Hints and solutions will link to Learning Pages where you can get more information about particular concepts. You decide how much help you want while practicing.

Practice SQL Window Functions | Xorthax's Trading Post

Tables Used

orders

Column	Type
orderid	bigint
customerid	bigint
orderdate	timestamp without time zone
totalamount	double precision
status	text

Expected Output

Column
customerid
orderid
totalamount

11. The Largest Order in the Galaxy

Reveal every order that matches the highest total ever placed.

Xorthax wants to identify all customers who placed the largest single order in the galaxy. Write a query to calculate the highest order amount and return every order that matches that amount.

Write Your Query

This problem is labeled as Intermediate. You don’t need to be an expert—just comfortable with SQL and willing to experiment. If you get stuck, the hints and solution will guide you step by step.

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.

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