The Next Order Countdown :Track Each Customer’s Order History and Their Next Purchase Date Intermediate
Show each customer's order along with the date of their next one, if it exists.
Xorthax wants to understand the order patterns of his customers. Write a query to display each customer's Order ID, the date of that order, and the date of their next order, if it exists.
Write Your Query
This represents customer behavior analysis, where businesses study purchase intervals to understand buying frequency and predict future activity.
You’ll practice comparing consecutive records within a group to analyze sequential event relationships.
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.
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SQL for Data Analysis (O’Reilly)
SQL techniques tailored for analytics and reporting workflows.
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