What are E-R diagrams?

- E-R diagrams, i.e. Entity-Relationship diagram represent relationship between various tables in the database.

What are E-R diagrams?

- The logical structure of databases is illustrated in the ER diagrams. These diagrams use symbols for representing different types of information. Boxes are used for representing entities. Rhombuses are used for representing relationships and ovals are used for representing attributes.

- For a good database creation it is essential to have ER diagram. These diagrams follow top-down approach. To focus on how the database really works with all data flow and interactions, the best pattern is ER Diagrams