What is true of using group functions on columns that contain NULL values?

Question

Options

• AGroup functions on columns ignore NULL values.
• BGroup functions on columns returning dates include NULL values.
• CGroup functions on columns returning numbers include NULL values.
• DGroup functions on columns cannot be accurately used on columns that contain NULL values.
• EGroup functions on columns include NULL values in calculations if you use the keyword

• A
  84% (41)
• B
  4% (2)
• C
  8% (4)
• D
  2% (1)
• E
  2% (1)

Explanation

group functions on column ignore NULL values

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