Get Design Min Max Notation Er Diagram Example Download Zip Pictures. 4 company er schema diagram using (min, max) notation. Er diagram stands for entity relationship diagram, also known as erd is a diagram that displays the relationship of entity sets stored in a database.
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Figure 3.15 er diagram for the company schema, with all role names included and with structural constraints on relationships. An er diagram is a means of visualizing how the information a system produces is related. Entity relationship diagram symbols & notations mainly contains three basic symbols which are rectangle, oval and diamond to represent relationships. The er diagram example below shows an entity with some columns, among which a foreign key is used in you've learned what an er diagram is and how to create erd for database design or data modeling.