Components of ER Diagram

Entity-Relationship model making possibility to describe a database using components of ER Diagram in which in the tables data can be the point to data in other tables - for instance, your entry in the database could point to several entries.

ConceptDraw PRO is a powerful professional software extended with Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park. It gives the ability to draw ER diagram (ERD) for visual describing database using the Crow’s Foot notation icons and Chen’s notation icons.

Components of ER Diagram

Example 1. Components of ER Diagram, Crow's Foot and Chen's notations

The Chen's ERD notation is still used and is considered to present a more detailed way of representing entities and relationships.

Most other notation systems are adaptations, or use part of these original styles. Here is a brief list of some of other standards that have been developed:

  • Bachman notation
  • Barker’s notation (ERDs for Oracle)
  • EXPRESS and EXPRESS-G notation
  • IDEFX1
  • UML class diagrams
  • Merise
  • Object role modeling
  • (Min – Max) notation

ER Diagram, Chen's notation

Example 2. ER Diagram, Chen's notation

ERDs are an invaluable tool for software engineers, particularly since computing capacity, and thus data storage capacity, has markedly increased in recent years. They allow every aspect of database design to be managed, tested and communicated before implementation. Because ERDs have such a broad scope of influence across database activities, it’s imperative the standardized notation can be utilized and interpreted by a wide variety of stakeholders.

ER Diagram, Crow's Foot

Example 3. ER Diagram, Crow's Foot

The Entity-Relationship Diagram (ERD) solution from ConceptDraw Solution Park extends ConceptDraw PRO vector graphics and diagramming software with the ability to draw your own entity relationship diagrams using Chen's or Crow's Foot notations applying 2 libraries with numerous predesigned ER icons:

  • ERD, Chen's Notation library
  • ERD, Crow's Foot Notation library

ERD Solution

Example 4. ERD Solution

The samples you see on this page were created in ConceptDraw PRO using the components of ER diagram from the libraries of Entity-Relationship Diagram (ERD) Solution. An experienced user spent 10-15 minutes creating each of these samples.

Use the Entity-Relationship Diagram (ERD) Solution for ConceptDraw PRO to create your own Entity-Relationship Diagrams of any complexity quick, easy and effective.

The Entity-Relationship Diagrams designed with ConceptDraw PRO are vector graphic documents and are available for reviewing, modifying, converting to a variety of formats (image, HTML, PDF file, MS PowerPoint Presentation, Adobe Flash or MS Visio), printing and send via e-mail in one moment.

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