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Practice SQL Window Functions | Xorthax's Trading Post

Tables Used

inventory

Column	Type
inventoryid	bigint
productid	bigint
quantityavailable	bigint
location	text
lastrestocked	text

Expected Output

Column
productid
quantityavailable

21. The Peak Stock Protocol

Display the record with the highest inventory for each product in the galaxy.

The inventory team at Xorthax's trading post needs to know the highest recorded stock level for each product. Write a query to display only the record with the highest quantity available for each product.

Write Your Query

This problem is labeled as Advanced. 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.

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