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Answer:
There could be a customer with the same name or surname. It could cause a mess in your database if the customer wants payback for something and there will be the customer with the same name. I think that the primary key should be consisted of unique Customer's ID number.
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Explanation:
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Using customers first or last name as primary key will not uniquely identify a customer.
What is Primary key
A primary key is an attribute that uniquely identifies input in a database, in our example, it is possile that two or more customers have the same name, hence the problem this will cause is that after adding the first customer to the database? we cannot go ahead to add more customers with the same name.
In summary, the primary key must be unique to accommodate different users.
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