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Enhanced Entity-Relationship (EER) diagrams are an essential part of the modeling interface in MySQL Workbench. EER diagrams provide a visual representation of the relationships among the tables in your model. Revisions made with the Model Editor are shown in the associated diagram.

The enhanced entity?relationship (EER) model (or extended entity?relationship model) in computer science is a high-level or conceptual data model incorporating extensions to the original entity?relationship (ER) model, used in the design of databases.

Entity-Relationship (ER) model is a visual representation of the table's structure and the relationships between logically related tables. In ER modeling the database structure is represented as a diagram known as ER diagram (ERD). An ER diagram gives a better understanding of the overall database structure.

ERD stands for entity relationship diagram. People also call these types of diagrams ER diagrams and Entity Relationship Models. An ERD visualizes the relationships between entities like people, things, or concepts in a database. An ERD will also often visualize the attributes of these entities.

In a mandatory relationship, every instance of one entity must participate in a relationship with another entity. In an optional relationship, any instance of one entity might participate in a relationship with another entity, but this is not compulsory.

There are three types of relationships that can exist between two entities. One-to-One Relationship. One-to-Many or Many-to-One Relationship. Many-to-Many Relationship.

What are the components of an entity-relationship diagram? ER diagrams or ERD's are composed of three main elements: entities, attributes, and relationships. Entities - typically displayed in a rectangle, entities can be represented by objects, persons, concepts, or events that contain data.