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Functional dependencies
Message
De
26/08/2005 21:08:05
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
 
 
À
16/08/2005 02:35:55
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 8
Database:
Visual FoxPro
Divers
Thread ID:
01041222
Message ID:
01044476
Vues:
12
>hi all,
>any idea .
>
>Consider the following set of functional dependancies :
>
>
>
>F = { AB ــ> CD , D ـــ> EF , G ــــ> A , Eــــــ>B , C ــــ> G }
>
>
>
>a- prove that the following two functional dependencies are entailed by F , using only the definition of a functional dependency :
>
>
>
>1 - DG ــــ> AEF
>
>2 - EG ـــــ> FG
>
>thanks.

What do you mean with "functional dependency"? And what do the combinations, like "AB" or "EF" stand for?
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
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