Made with
ConceptDraw
DIAGRAM 18

Entity-Relationship Diagram

Entity–Relationship modeling was developed by Peter Chen in 1976 for database design. Usually ER Model is constructed as abstract data model which defines information structure and data.

The Entity-Relationship Diagram (ERD) is the world-known way to show the logical structure of databases in visual manner. It gives an overall plan of how the database will look and is constructed of graphical elements, mainly of rectangles (representing entities and their properties) and lines (representing relationships and relationships of entities with each other). All relationships are divided into three categories: one-to-one (1:1), one-to-many (1:N), and many-to-many (M:N). Each entity has properties or characteristics that are implemented in the form of attributes that describe each entity instance.

The best software tool for drawing Entity-Relationship Diagram is ConceptDraw DIAGRAM ector graphics software with Entity-Relationship Diagram (ERD) solution from Software Development area which gives the ability to describe a database using the Entity-Relationship model.

Entity-Relationship Diagram *

Example 1. Entity-Relationship Diagram (ERD) - Students and Teachers

Entity-Relationship Diagram (ERD) solution includes vector icons advocated by popular Chen's or Crow's foot notations that can be used when describing an enterprise database. All they are offered by the libraries: ERD Chen's Notation and ERD Crow' Foot Notation.

ERD Libraries

Example 2. ERD Libraries

Develop ER models and ER diagrams using these predesigned vector objects, or start with one of predesigned ERD templates from the Entity-Relationship Diagram solution. Two professionally designed ERD templates (Chen and Crow's Foot) are available at ConceptDraw STORE.

ConceptDraw STORE - ERD Templates

Example 3. ConceptDraw STORE - ERD Templates

The vector graphic diagrams produced using the Entity-Relationship Diagram (ERD) solution and also samples included to it can be successfully used in whitepapers, presentations, datasheets, posters, or any technical materials.

Entity-Relationship Diagram

Example 4. Entity-Relationship Diagram

The Entity-Relationship Diagram samples you see on this page were created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Entity-Relationship Diagram (ERD) solution from ConceptDraw Solution Park. An experienced user spent 5 minutes creating each of these diagrams.

Use ConceptDraw DIAGRAM enhanced with Entity-Relationship Diagram (ERD) solution to draw quick and easy your own Entity-Relationship Diagram using Chen's or Crow's foot notations.

All source documents are vector graphic documents. They are available for reviewing, modifying, or converting to a variety of formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the ConceptDraw STORE. The Entity-Relationship Diagram (ERD) Solution is available for all ConceptDraw DIAGRAM or later users.






TEN RELATED HOW TO's:
Use the libraries from the Block Diagrams solution to draw block diagrams for your business documents, presentations and websites in a few minutes.Block Diagram
Picture: Block Diagram
Related Solution:
A Telecommunications network is a network of nodes, links, trunks and telephone switches that are connected, operated by telephone companies and realize telephone, audio, visual and data communications among the users. The telecommunications network can also include Internet, microwave, wireless equipment. This example was created in ConceptDraw DIAGRAM using the Computer and Networks Area of ConceptDraw Solution Park and shows the Telecommunications network.Telecommunication networks. <br>Computer and Network Examples *
Picture: Telecommunication networks. Computer and Network Examples
Related Solution:
Data structure diagram (DSD) is intended for description of conceptual models of data (concepts and connections between them) in the graphic format for more obviousness. Data structure diagram includes entities description, connections between them and obligatory conditions and requirements which connect them. Create Data structure diagram with ConceptDraw DIAGRAM.Data structure diagram with ConceptDraw DIAGRAM
Picture: Data structure diagram with ConceptDraw DIAGRAM
Building plans are usually very complicated and a hard work to do. It would be nice to use a proper drawing software to facilitate the task. Design a site plan quick and easily with all the stencils and samples from ConceptDraw libraries. This drawing shows content of the ConceptDraw vector libraries related to the site planning and arrangement of the living environment. ConceptDraw delivers about 50 libraries containing near one and a half thousands vector objects that will help you to design territory arrangement plans and make the Site plan sketches. You can use the Parking and Roads library for designing a parking space, or drawing transport management schemes. The Site Accessories library provides a number of objects, that allow you to depict various equipment of vehicle access control, street lamps, benches, trash cans and other items of the street environment.Building Drawing Software for Design Site Plan
Picture: Building Drawing Software for Design Site Plan
Related Solution:
The vector stencils library Crow's Foot Notation from the solution Entity-Relationship Diagrams (ERD) contains specific symbols of the Crow's foot notation such as relationship symbols and entity symbols for ConceptDraw DIAGRAM software.Martin ERD Diagram
Picture: Martin ERD Diagrams
Related Solution:
Create business process diagrams (BPMN 2.0.) with ConceptDraw using professional looking templates. ConceptDraw is business process improvement tools.Business Process Modeling Notation Template *
Picture: Business Process Modeling Notation Template
Need to draw a diagram, process chart, flowchart, organizational chart, graphic design? ConceptDraw can help you to make professional graphic documents quickly.Best Diagramming *
Picture: Best Diagramming
Related Solution:
No need for any special drawing skills to create professional looking diagrams outside of your knowledge base. ConceptDraw DIAGRAM takes care of the technical details, allowing you to focus on your job, not the drawing. ConceptDraw DIAGRAM delivers full-functioned alternative to MS Visio. ConceptDraw DIAGRAM supports import of Visio files. ConceptDraw DIAGRAM supports flowcharting, swimlane, orgchart, project chart, mind map, decision tree, cause and effect, charts and graphs, and many other diagram types.MS Visio Look a Like Diagrams *
Picture: MS Visio Look a Like Diagrams
If we divide computer networks by scale, we get several main categories. The smallest network is PAN, as it connects personal devices themselves, and as the number of users grows, a local area network can be recognized, and campus area networks (CAN) connects several local networks located within some area like a university or a corporation. Computers connected to CAN share public educational materials and list of CAN network examples includes such prestigious universities like Stanford and Carnegie Mellon. This is an example of a computer network diagram created for a campus area network. It was created using using ConceptDraw solution for the Computer and Network diagramming. The specific of this sample campus network is its distribution. It is rather broad to embrace a big campus territory. This diagram can be applied as a template for designing custom area network topology diagram for a particular educational institution.Campus Area Networks (CAN). <br>Computer and Network Examples *
Picture: Campus Area Networks (CAN). Computer and Network Examples
Related Solution:
ORM diagrams are a straightforward and incredibly effective way to explore domain concepts with your stakeholders.ORM Diagram
Picture: ORM Diagram
ConceptDraw
DIAGRAM 18