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There are three basic elements in an ER Diagram: entity, attribute, relationship. There are more elements which are based on the main elements. They are weak entity, multi valued attribute, derived attribute, weak relationship, and recursive relationship.

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.

We need a notation that allows broader understanding by members of the entire system development team. The Unified Modeling Language (UML) is a widely accepted language used by analysts and software developers that is an excellent fit for the graphic representation of ER diagrams.

An entity relationship diagram (ERD), also known as an entity relationship model, is a graphical representation that depicts relationships among people, objects, places, concepts or events within an information technology (IT) system.

Data modeling is a technique to document a software system using diagrams and symbols. It is used to represent communication of data. The highest level of abstraction for the data model is called the Entity Relationship Diagram (ERD). It is a graphical representation of data requirements for a database.

1. How to Create an ER Diagram in Visio Step 1: Select a Diagram to Create on Visio. Step 2: Create Entities for your Diagram. Step 3: Draw Relationships and Attributes. Step 4: Save your Visio ER Diagram. Step 1: Choose to Create an ER Diagram on EdrawMax. Step 2: Start Working on your ER Diagram. Step 3: Export and Insert.

Below points show how to go about creating an ER diagram. Identify all the entities in the system. An entity should appear only once in a particular diagram.Identify relationships between entities.Add attributes for entities.Mark the cardinalities and participation between the entities.