Entity Relationship Diagram Example: Student Score - Ternary Relationship

Description:

ERD is a graphical representation of a conceptual structure of a problem domain being modeled. This is an ER diagram example that shows the use of ternary relationship in an ERD.

This ER design example and template can be edited with Visual Paradigm Online, an online diagramming software. Click Use this Template to edit this ERD template, or click Create Blank to create a new one.

What is ER Diagram?

An entity relationship diagram (also known as ER model or ER diagram in short) describes interrelated things of interest in a specific domain of knowledge. An ER diagram is usually the result of systematic analysis to define and describe what is important to processes in an area of a business. It does not define the business processes; it only presents a business data schema in graphical form. It is usually drawn in a graphical form as entities that are connected by relationships which express the associations and dependencies between entities.

Benefits of ER diagrams

  1. Easy to understand and do not require a person to undergo extensive training to be able to work with it efficiently and accurately
  2. Easily communicate with developers, customers, and end users, regardless of their IT proficiency.
  3. Readily translatable into relational tables which can be used to quickly build databases.
  4. Can directly be used by database developers as the blueprint for implementing data in specific software applications.
  5. May be applied in other contexts such as describing the different relationships and operations within an organization.

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