We often store data within a database in multiple tables. These might be a table of customers, a table of orders, or a table of products. When a customer orders a product, there is a relationship that now connects those tables together. Customer A buys products 1, 2, and 3 using order number 8888.
Why do you think this is critical to understand from a mathematical point of view? Hint: think of the tables as sets. Explain your thoughts, especially the practical implications.