Entity-Relationship Diagram (ERD)

An Entity-Relationship Diagram (ERD) is a visual presentation of entities and relationships. That type of diagrams is often used in the semi-structured or unstructured data in databases and information systems.

At first glance ERD is similar to a flowchart, but it has specialized symbols and the meanings of those symbols, which make it applicable in the database models designing. An ERD is another best practice to define business processes and the foundation for a relational database.

An ERD is a general result of methodical analysis to determine and depict what is significant to processes in a business circle. It only shows a business data schema in the vector graphical form. The first step of the information system construction takes these models during the requirements analysis. The data modeling mechanism can be applied to build any logical data model, such as the relational model, and this is mapped to a real model during design.

This solution extends ConceptDraw PRO software with the ability to describe a database using the Entity-Relationship model.

This solution includes icons advocated by Chen's and Crow's Foot notation that can be used when describing a database.

The vector graphic diagrams produced when using this solution can be employed in your white papers, presentations, data sheets, posters, or any technical material.


There are 2 stencil libraries containing 45 vector graphics for Entity-Relationship Diagram (ERD) solution.

Design Elements — Chen ERD

Design Elements Entity-Relationship Diagram (ERD) - Chen

Design Elements — Crow's Foot ERD

Design Elements — Crow's Foot ERD

Examples

The samples you see on this page were created in ConceptDraw PRO using the Entity-Relationship Diagram (ERD) solution, and demonstrate some of the solution's capabilities and the results you can achieve.

All source documents are vector graphic documents. They are available for reviewing, modifying, and converting to a variety of available formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the Solution Park, for all users who have installed the Entity-Relationship Diagram (ERD) solution.

Example 1: Entity-Relationship Diagram Using Chen's Notation

This diagram was created in ConceptDraw PRO using the Chen ERD library from the Entity-Relationship Diagram (ERD) solution. An experienced user spent 20 minutes creating this sample.

This sample diagram using the Entity-Relationship Diagram (ERD) Solution shows the type of icons and graphics you can use to develop a model of a database of arbitrary complexity according to Chen's notation.

This diagram example was redrawn from en.wikipedia.org using ConceptDraw PRO software enhanced with ConceptDraw ERD solution.

Entity-Relationship Diagram Using Chen's Notation

Example 2: Entity-Relationship Diagram Using Crow's Foot Notation

This diagram was created in ConceptDraw PRO using the Crows Foot ERD library from the Entity-Relationship Diagram (ERD) solution. An experienced user spent 20 minutes creating this sample.

This sample diagram using the Entity-Relationship Diagram (ERD) Solution and shows the type of icons and graphics you can use to develop a model of a database of arbitrary complexity using Crow's Foot notation.

This diagram example was redrawn from http://www2.cs.uregina.ca using ConceptDraw PRO software enhanced with ConceptDraw ERD solution.

Entity-Relationship Diagram Using Crow's Foot Notation

Example 3: Entity-Relationship Diagram — WordPress File Reference

This diagram was created in ConceptDraw PRO using the ERD, Chen’s Notation Library from the Entity-Relationship Diagram (ERD) Solution. An experienced user spent 10 minutes creating this sample.

This sample shows an Entity-Relationship Diagram of a WordPress file reference using Chen’s Notation, which represents the entities as rectangles and attributes as ovals. Creating similar diagrams in ConceptDraw PRO will take just minutes.

Entity-Relationship Diagram —  WordPress File Reference

Example 4: Entity-Relationship Model Diagram

This diagram was created in ConceptDraw PRO using the ERD, Crow’s Foot Notation Library from the Entity-Relationship Diagram (ERD) Solution. An experienced user spent 15 minutes creating this sample.

This sample demonstrates an entity-relationship model diagram. Highlight the boxes in the ERD diagram with bright colors to make it attractive and easy to remember.

Entity-Relationship Model Diagram

Example 5: Entity-Relationship Diagram — Students and Teachers

This diagram was created in ConceptDraw PRO using the ERD, Crow’s Foot Notation Library from the Entity-Relationship Diagram (ERD) Solution. An experienced user spent 15 minutes creating this sample.

This Entity-Relationship Diagram shows the relationships between the Students and Teachers entities. Drawing all entities of ER-diagram in one color spectrum, highlighting the headers, you will make your diagram look stylish and then successfully use it in different conferences, discussions, publications.

Entity-Relationship Diagram — Students and Teachers