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Sagot :
Answer:
customer IDs
phone numbers
social security numbers
Explanation:
A primary key may be defined as the special choice of the attributes which uniquely specify tuple in the relation. It is the set of columns where values uniquely identify each of the rows in the table.
It is use to find the unique record form the table or database. It is the key in the relational database which is unique for each record. It can be a unique number such as identification number, vehicle number, etc.
In the context, the primary keys which is used for the customers in a departmental store database are :
-- customer IDs
-- phone numbers
-- social security number
All these are unique set of number and they are the primary keys for a customer as they are uniquely identifies a particular customer. No other person is given the same phone number or phone number.
Answer:
customer IDs
phone numbers
social security numbers
Explanation:
It right on Edge.
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