Question: Question 7 Which two rules apply to primary keys? Values can have duplicates and may not be NULL Values must be unique and can be

Question 7
Which two rules apply to primary keys?
Values can have duplicates and may not be NULL
Values must be unique and can be NULL
Values must be unique and may not be NULL
Values can have duplicates and can be NULL
Question 7 Which two rules apply to primary keys? Values can

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