Database Systems: Concepts, Design and Applications

6.5. E-R Diagram Symbols

An E-R model is normally expressed as an entity-relationship diagram (called E-R diagram). E-R diagram is graphical representation of an E-R model. As depicted in the previous diagrams, the set of symbols (building blocks) to represent E-R diagram already shown in Chapter 2, Section 2.7.7, in Fig. 2.18, are further summarised in Fig. 6.21.

Fig. 6.21. Building blocks (symbols) of E-R diagram

Fig. 6.22. Complete E-R diagram of banking organisation database

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6.5.1. Examples of E-R Diagrams

Examples ...