47+ Design Blog Er Diagram Example Download Zip Images. Er diagram stands for entity relationship diagram, also known as erd is a diagram that displays the relationship of entity sets stored in a database. This is illustrated in the example execution below:
An er diagram shows the relationship among entity sets.
Er diagram example & solution. Designing an er diagram consider the following set of requirements for a university database. For example, student roll number can uniquely identify a student from a set of students. Er diagrams are created based on three basic concepts: