Re: Functional and mulitvauled depencies?

From: Dan Wu <danwu_at_cs.uregina.ca>
Date: 2000/04/18
Message-ID: <Pine.SGI.3.91.1000418094201.5122B-100000_at_ARISTOTLE.CS.UREGINA.CA>#1/1


> Hi
> If i have the following set of relation, say S with the following tuples
> A B C
> t1 A1 b2 c3
> t2 a4 b2 c3
> t3 a5 b3 c3
> t4 a5 b3 c4
>
> Then, which of the following functional and multivalued depencies does not
> hold over relation S?

  1. B -> C does not hold by definition.

all the other three hold by definition.

> b) B ->-> C
> c) A ->-> B
> d) BC -> A
>
>
>
>
> --
> Regards
> Low Y S
> ICQ:3140912
> Pse return mail to: slasher_at_edsamail.com.sg
> (P.S Not more than 500K attachments)
>
>
>
Received on Tue Apr 18 2000 - 00:00:00 CEST

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