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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
orderdate
totalamount
rollingtotal
rank

27. 5-Transaction Tally Tracker

Calculate a rolling sum of each customer's last 5 orders and rank them accordingly.

Xorthax wants to analyze the transaction volume for each customer. Write a query to rank each order within its customer's history based on the rolling sum of the last 5 transactions.

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.

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