• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

I. Database Design > 3. Implementing Entity-Relationship Models: Relational Dat...

Chapter 3. Implementing Entity-Relationship Models: Relational Databases

An E/R model of a database is an abstract model, visualized through an E/R diagram. For this to be useful, we must translate the abstract model into a concrete one. That is, we must describe each aspect of the model in the concrete terms that a database program can manipulate. In short, we must implement the E/R model. This requires implementing several things:

  • The entities

  • The entity classes

  • The entity sets

  • The relationships between the entity classes

The result of this implementation is a relational database.

As we will see, implementing the relationships usually involves some changes to the entity classes, perhaps by adding new attributes to existing entity classes or by adding new entity classes.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint