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Draw 4 small Enhanced Entity-Relationship models

This project received 10 bids from talented freelancers with an average bid price of $206 USD.

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Skills Required
Project Budget
$30 - $250 USD
Total Bids
10
Project Description

I have 4 small casses.
Draw 4 easy entity-relationship diagram that i have to make for an assessment.
Make sure that you specify all details in the diagram, including cardinality (mapping) constraints, participation constraints, keys. etc.
Please use the EERD notation.

After that i need to convert it to an relational db model (diagram) but only if the eerd is accepted, So bid without this if the eerd is accepted i will add to the payment to get this part done...

I need the diagrams before Friday (25-10-2013) !! After that it's useless..

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