my-guitar-shop-database-exersices/Exercise_2.5.sql

SELECT 
    p1.product_name, p1.list_price
FROM
    products p1
        JOIN
    products p2 ON p1.product_id != p2.product_id
        AND p1.list_price = p2.list_price
WHERE
    p1.list_price = p2.list_price
ORDER BY p1.product_name ASC;