Consider this question from a business intelligence perspective.
a. What might Shoppers Drug Mart or a grocery chain do with data that correlates a particular customer to that customer’s purchases over time?
b. What information can such data provide? Assume that the data include not only the customer’s identity, purchases, and purchase items, but the store location and the date and time of sale. The cards are valid at any store in the chain, so purchases at different stores can be associated with the same customer at a centralized data warehouse.