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Data Modeling Made Simple with ER/Studio Data Architect by Steve Hoberman

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CHAPTER 7

Relationships

Rules all around us

Relationships tell the tale

Connecting the dots

This chapter defines rules and relationships. Data rules are distinguished from action rules. Cardinality and labels are explained so that you can read any data model as easily as reading a book. Other types of relationships, such as recursive relationships and subtyping are also discussed. Learn how to create and edit all of these different types of relationships in ER/Studio.

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