Entity Relationship Diagram Example: Examination Scheduling

Description:

This is a simple ER diagram example that shows the 4 entities involved in an examination scheduling system. Each entity contains a number of columns, which are used to represent their properties. The relationships between entities are represented by connector lines with different cardinality.

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 Entity Relationship Diagram?

Entity relationship diagrams (ERD) are widely used in database design and systems analysis to represent systems or problem domains. An ER diagram is a pictorial representation of the information that can be captured by a database. It allows database professionals to describe an overall data model of a system concisely yet accurately and can be easily transformed into the relational schema. The ERD is an implementation-independent representation of a problem domain and it facilitates communication between the end-user and the analyst.

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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