1045. Customers Who Bought All Products

Table: Customer +-------------+---------+ | Column Name | Type | +-------------+---------+ | customer_id | int | | product_key | int | +-------------+---------+ This table may contain duplicates rows. customer_id is not NULL. product_key is a foreign key (reference column) to Product table. Table: Product +-------------+---------+ | Column Name | Type | +-------------+---------+ | product_key