Database Reference
In-Depth Information
Figure 3-1.
Basic Concepts
Figure
3-2
provides a list of commonly used relational terms and their informal
equivalents:
Figure 3-2.
Relational Terms and their Informal Equivalents
Figure
3-3
illustrates how the terms are applied. Observe that the idea of
entity
and
relation
seem to be similar. This will be clarified later. For now, assume that similarity.
