ER Diagram Solutions

Cardinalities

How do you solve cardinalities such as:

  • One to many.
  • Many to many.
  • Multivalue attributes.

Here are some suggestions.

A student drawing en ER-Diagram

Two students explaining ER-Ds

By Per Thykjaer Jensen

Per is the WordPress expert at Business Academy Aarhus. Senior Lecturer at the Multimedia Design Programme. His background is in the Arts: MA Literature History and BA Art History. Later he added a MA in IT, interaction and Multimedia. And he is a wicked Linux user.

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