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ERD Models

Posted on 2007-11-26
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Last Modified: 2012-05-05
Hello

I am budding webdesigner and am currenlty teaching myself about relational databases (ERD's) & mysql.
I am picking up mysql quite easily but I am having some trouble with my ERD diagrams for my relational databases.
I am having trouble distingushing  Relationships. I am currently 'googling' random ERD questions and trying to answer them as best I can.
Can anyone help me or steer me to some good tutorials please?
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Question by:kevinb4940
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dportas earned 500 total points
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It's important to differentiate between ER modeling and the Relational Model. They are quite different things. Learn about the principles Relational Model first. Then learn about ER diagrams and ER modeling, which are design tools you can use to build relational databases.

Chris Date has two excellent books on the principles of RM. "Introduction..." is a classic and very comprehensive textbook. "... In Depth" is a lighter summary of some of the same material, although it does assume some familiarity with SQL.
http://www.amazon.com/Introduction-Database-Systems-Eighth/dp/0321197844
http://www.amazon.com/Database-Depth-Relational-Theory-Practitioners/dp/0596100124

Data Modeling Essentials by Simsion and Witt is one good source on ER modeling and design in general
http://www.amazon.com/Modeling-Essentials-Third-Graeme-Simsion/dp/0126445516

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