Order by Order, One by One:Identify Each Customer’s Chronological Order Sequence
Intermediate
Assign a row number to each customer's orders based on the order date.
Xorthax wants to identify the sequence of orders placed by each customer based on the order date. Write a query to assign a row number to each order for every customer.
Write Your Query
Answer:
select customerid,
orderid,
orderdate,
row_number() over (partition by customerid
order by orderdate) as orderrank
from orders;
Explanation:
This reflects tracking customer purchase history to understand the order sequence and frequency of their transactions.
You’ll work with sequencing data, ordering results by time, and organizing records within customer groups.
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.
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