Recap - Join
Part of the Fundamentals section of Coddy's SQL journey — lesson 45 of 72.
Challenge
MediumAvailable tables and columns:
<strong>orders</strong>:<strong>id</strong>,<strong>customer_id</strong><strong>products</strong>:<strong>id</strong>,<strong>unit_price</strong>,<strong>units_in_stock</strong><strong>order_items</strong>:<strong>id</strong>,<strong>order_id</strong>,<strong>product_id</strong>,<strong>quantity</strong>
Find the customer IDs of customers who have ordered products with a unit price less than 10, and list the total quantity of those cheap products each customer has ordered.
Return following columns:
- customer_id
- total_quantity (the sum of quantities of products with a unit price < 10 for each customer)
Try it yourself
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