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Ass1 Q20

Posted by Wiseguy 
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avatar Ass1 Q20
April 17, 2009 08:14AM
According to my knowledge the above question relates to Chapter 4 ( Relational Algebra ).
However this chapter is excluded in our preparation and also not mentioned in the Tutorial letter.
Anyone in disagreement ?
Re: Ass1 Q20
April 17, 2009 11:39PM
There is a paragraph containing that gives the answer in the related material. I remember thinking the same thing as you, but then on careful re-read of a paragraph in search of something else, there the answer was...

Happy hunting (I would give a clue if I could remember where exactly I did find it)
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