Which of the following is true?

 Posted by Bandi on 9/26/2013 | Category: Sql Server Interview questions | Views: 1528 | Points: 40
Select from following answers:
  1. NULL values are ignored for all the aggregate functions
  2. NULL values are included for all the aggregate functions.
  3. When an aggregate function is included in the SELECT clause, all other expressions in the SELECT clause must either be aggregate functions or included in a GROUP BY clause.
  4. Both 1 and 3
  5. All Above

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