bomtrm

Database Diagramming Conventions
We use the following notational conventions in our database diagrams:
Figure 2 – 1
Database Diagram
Conventions
Server Model Diagram Elements and Notation
Mandatory and Optional Foreign Keys
A value entered in the column in the foreign key
must match a value in the primary key column.
A value entered in the column in the foreign key
must match either a value in the primary key column,
or else it must be null.
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High–Level Design
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