Question: Choose a correct statement: A. Foreign keys cannot have null values B. Primary keys cannot have a null value , but unique keys C.

Choose a correct statement: A. Foreign keys cannot have null values B.

Choose a correct statement: A. Foreign keys cannot have null values B. Primary keys cannot have a null value , but unique keys C. Super-keys cannot have null values D. Unique keys cannot have a null value, but a primary keys

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