A forum Entity-Relationship (ER) diagram is a diagram that displays the relationship of entity sets stored in a forum database. As shown in the forum ER diagram, the entity-relationship diagrams help to explain the logical structure of forum databases. The forum ER diagram shows that the forum has a forum user, forum session, forum topic, and forum reply. The attached diagram is created using EdrawMax, and it contains different symbols that use rectangles to represent entities, ovals to define attributes, and diamond shapes to represent relationships. As represented in the diagram, a forum model ER diagram has user id, user name, user password, user birthday, and others.
