Suppose you discover that your company keeps sales data from the call center, the

website, and the physical stores in separate databases. Moreover, the fields have slightly

different names. $($e$.$g$.$ one database has field called Product Number and another

database has a field named SKU$1.)$ What problems can you imagine this might cause?

$($For example, it might make it hard for customers to return products purchased on the

website to a physical store, since the point of sales systems at the store may not be able

to read the web site sales records.$)$