14+ Entity Relationship Diagrams. In this tutorial, we’ll look into the concept of an erd, its components and types, and how to create an erd. Web an entity relationship (er) diagram is a type of flowchart that illustrates how “entities” such as people, objects or concepts relate to each other within a system.
People also call these types of diagrams er diagrams and entity relationship models. Web what is an entity relationship diagram (erd)? Review the entities and attributes to see if they include everything you want to store in the system.