One real-world example of using a join to solve a problem is combining customer and order data from separate tables in a retail company's database. Imagine that a retail company has two separate tables in its database: one for customer information and one for order information. The customer table includes columns for customer ID, name, and address, while the order table includes columns for order ID, customer ID, and purchase date. To create a report that displays the customer's name, address, and all of their past orders, a join would be necessary to combine the customer and order data. The join would be performed using the customer ID column, which exists in both tables and can be used to link each customer to their respective orders. The resulting table would include columns for customer ID, name, address, order ID, and purchase date. This would allow the retail company to easily view and analyze customer and order data in one place rather than having to reference multiple tables. It's no surprise that this can pop up as one of the SQL scenario-based interview questions on JOINs.