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DIAGRAM 15

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.






NINE RELATED HOW TO's:

Data Flow Diagram Symbols. DFD Library →

Any information system receives data flows from external sources. In order to visualize them there is a list of data flow diagram symbols that describes how the system components cooperate. If you want to create a data flow diagram, ConceptDraw DIAGRAM Solution Park has DFD Library that contains both Yourdon and Gane-Sarson notations. This figure shows the content of vector libraries, delivered with ConceptDraw solution for data flow diagram (DFD). There are three libraries composed from about 50 vector objects used to make data flow diagrams. They include a complete set of objects utilized by Yourdon-Coad and Gane-Sarson notations - two primary notations that are apply for data flow diagramming. Also, one can discover additional "Data flow diagram (DFD)" library that provides a data flow diagram elements for designing level 1 and context-level data flow diagrams.Data Flow Diagram Symbols. DFD Library *
Picture: Data Flow Diagram Symbols. DFD Library
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Swim Lanes Flowchart. Flowchart Examples →

This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Cross-Functional Flowcharts solution from the Business Processes area of ConceptDraw Solution Park. This sample shows the Swim Lanes Flowchart of Identification and logging.Swim Lanes Flowchart. <br>Flowchart Examples *
Picture: Swim Lanes Flowchart. Flowchart Examples
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Cross Functional Diagram →

You want design the Cross Functional Diagram and need powerful software? Then ConceptDraw DIAGRAM diagramming and vector drawing software extended with Cross-Functional Flowcharts Solution is exactly what you need.Cross Functional Diagram *
Picture: Cross Functional Diagram
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Geo Map - USA - Nevada →

Nevada is a state in the western, mountain west, and southwestern regions of the United States. The vector stencils library Nevada contains contours for ConceptDraw DIAGRAM diagramming and vector drawing software. This library is contained in the Continent Maps solution from Maps area of ConceptDraw Solution Park.Geo Map - USA - Nevada *
Picture: Geo Map - USA - Nevada
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UML Diagram →

While developing software, it is very important to have a visual model, because it helps to represent the logic and the architecture of an application. Experienced engineers use UML diagrams to denote relationships between classes and their instances. UML is a general language for a set of diagrams like deployment diagrams, object diagrams or use case diagrams. This diagram represents UML class diagram used for a software system development using an object-oriented method. Class diagrams are categorized as static structure diagrams that depict the physical structure of a system. Class diagram divides a software system's structure into "classes". Classes are defined by the methods and variables of objects. UML Class diagram is used to depict relationships and source code dependencies between objects.UML Diagram *
Picture: UML Diagram
Related Solution:

Entity-Relationship Diagram →

Entity Relationship Diagram (ERD) is the world-known way to show the logical structure of databases in visual manner. The best software tool for drawing Entity-Relationship Diagram is ConceptDraw DIAGRAM vector 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. The vector graphic diagrams produced using this solution can be successfully used in whitepapers, presentations, datasheets, posters, or any technical materials.Entity-Relationship Diagram *
Picture: Entity-Relationship Diagram
Related Solution:

Entity Relationship Diagram Software for Mac →

ER-modeling nowadays is a very popular approach for database design. If you are tired of looking for a good entity relationship diagram Software for Mac, then your search is almost over. ConceptDraw DIAGRAM is a great tool for creating diagrams of any complexity with tons of editable samples and templates. This diagram represents the vector library of the Chen’s and Crow’s Foot notation icons for drawing ERD (entity-relationships diagram). ConceptDraw Entity Relationship Diagram solution delivers the ability to visualize databases structure on both Mac and PC. The "bricks" entity-relationships models are the entity, and the relation. An entity is represented by a rectangle comprising the entity name. It means an object, information about which should be available and stored. A relation is intended to show a relations between two entities. There are several types of relations between entities. To show there are a number of different symbols for the types of relationships.Entity Relationship Diagram Software for Mac *
Picture: Entity Relationship Diagram Software for Mac
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Flowchart Maker →

A flowchart maker is a software showing the interaction, sequence or organization. It also known as flowchart maker or ConceptDraw DIAGRAM standard supplied with different types of symbol collections: standard symbols, branded set and authored. It used strictly for enhancing scientific or business documents with abstract explanatory pictures. Business graphic applications show a special knowledge representations and include many features for creating schematic pictures. These graphic tools are known as flowchart maker or flowchart maker software.Flowchart Maker *
Picture: Flowchart Maker
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