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    Question

    Query optimization heuristics often

    include:
    A Push selections early Correct Answer Incorrect Answer
    B Join smaller tables first Correct Answer Incorrect Answer
    C Replace cartesian products with joins Correct Answer Incorrect Answer
    D Use indexes where possible Correct Answer Incorrect Answer
    E All of the above Correct Answer Incorrect Answer

    Solution

    All are heuristics used before cost-based optimization to reduce intermediate result size.

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