Zamolxis ERD

The Entity Relationship Diagram built for Progress OpenEdge.

What is an Entity Relationship Diagram (ERD)?

An entity relationship diagram (ERD) shows the relationships of entity sets (tables) stored in a database, in this context an entity is a component of data. In other words, ER diagrams illustrate the logical structure of databases.

When documenting a system or process, looking at the system in multiple ways increases the understanding of that system. ERD diagrams are commonly used to display the contents of a data store. They help us to visualize how data is connected in a general way, and are particularly useful for constructing a relational database.