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      Question

      Aggregate function in SQL

      A An aggregate function in SQL performs a calculation on multiple values and returns a single value. Correct Answer Incorrect Answer
      B avg, count, sum, min, max are aggregate function Correct Answer Incorrect Answer
      C An aggregate function ignores NULL values when it performs the calculation, except for the count function Correct Answer Incorrect Answer
      D All three are correct Correct Answer Incorrect Answer
      E None Correct Answer Incorrect Answer

      Solution

      The correct answer is D

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