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    Question

    In a star schema, what is the main advantage of using

    surrogate keys in fact tables?
    A Reduce query time with indexes Correct Answer Incorrect Answer
    B Allow natural key reuse across dimensions Correct Answer Incorrect Answer
    C Maintain referential integrity during slowly changing dimensions Correct Answer Incorrect Answer
    D Optimize ETL processes with uniqueness Correct Answer Incorrect Answer
    E All of the above Correct Answer Incorrect Answer

    Solution

    Surrogate keys are artificial keys used in dimensions to avoid natural key duplication, speed joins, and handle SCDs cleanly.

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