Q64 Which statement is true about aggregate functions?

Q64 Which statement is true about aggregate functions?

  • (A). Aggregate functions can be nested to any number of levels
  • (B). The AVG function implicitly converts NULLS to zero
  • (C). Aggregate functions can be used in any clause of a SELECT statement
  • (D). The MAX and MIN functions can be used on columns with character data types
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