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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
totalamount
firstorderdate

41. The First Order Ever Placed

Find the earliest order date and amount for every customer in the galaxy.

Xorthax wants to know the first order placed by each customer in the galaxy. Write a query to find the first order date and the orderid and total amount of the first order for every customer.

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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