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 Database Design and Application Architecture
 Relations, dependencies and normal form
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diydave
Starting Member

1 Posts

Posted - 08/16/2013 :  10:19:19  Show Profile  Reply with Quote
Hi everybody! I have some issues in understanding about relations and dependencies. I will show two examples and what I want to know:

Assume the relation GTX {G,T,X} with the following dependencies:

G,X -> T
T -> X

or this one:

Relation {W,X,Y,Z}:

X,Y -> Z
Z -> W

So to my question, how do I properly draw a dependency diagram for this kind of relations? (tutorials or/and explanations are much appreciated)
How do I see what the primary key is? (I know what a pk is)
In which normal are the relations?


I have never been able to understand this fully and always got confused by the tutorials I found. I appreciate all answers!

/David

Edited by - diydave on 08/16/2013 10:21:08
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