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    Question

    Which of the following is used to uniquely identify a

    record in a database table?
    A Foreign Key Correct Answer Incorrect Answer
    B Primary Key Correct Answer Incorrect Answer
    C Candidate Key Correct Answer Incorrect Answer
    D Composite Key Correct Answer Incorrect Answer

    Solution

    "A Primary Key uniquely identifies each record in a database table. It ensures no two records have the same value in the specified field. A table can have only one primary key. Primary keys cannot contain NULL values. Used for indexing and referencing."

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