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    Question

    In a database, a 'Primary Key' is a field

    that:
    A Must contain monetary values. Correct Answer Incorrect Answer
    B Uniquely identifies each record in a table. Correct Answer Incorrect Answer
    C Is used to link two databases together. Correct Answer Incorrect Answer
    D Can have duplicate values. Correct Answer Incorrect Answer

    Solution

    A Primary Key is a special relational database field (or combination of fields) that uniquely identifies each record/row in a table. Its values must be unique and cannot be NULL. It is the main method of ensuring data integrity and creating relationships between tables.

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