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Mary is a new employee. Her details are added to the employee table. She is given an employee number. What is the purpose of this

Mary is a new employee. Her details are added to the employee table. She is given an employee number. What is the purpose of this number? Question 12 options: It uniquely identifies her It is used as the primary key in the employee table It is used as the foreign key in the transaction table All of the above None of the above

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