Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 22 Sep 2017 My Price 4.00

aggregate functions

1. What restrictions apply to the use of the aggregate functions within the SELECT statement? How do nulls affect the aggregate functions?

2. Explain how the GROUP BY clause works. What is the difference between the WHERE and HAVING clauses?

3. What is the difference between a subquery and a join? Under what circumstances would you not be able to use a subquery?

 

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Maurice Tutor
(5)
Status NEW Posted 22 Sep 2017 07:09 AM My Price 4.00

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