Entity Relationship Software

Entity Relationship Diagram

ERD is a major data modelling tool which can help to organize your project's data into the entities and to define the relashionships between these entities.

It is convenient to design ER Diagrams using ConceptDraw PRO diagramming and vector drawing software extended with the Entity-Relationship Diagram (ERD) Solution from the Software Development Area for ConceptDraw Solution Park. This solution supports Chen's and Crow’s Foot notations that are often used to describe database structure.

In a Chen's notation, entities are represented by rectangles with the entities names inside and relationships are represented by diamonds. The attributes are drawn as ovals and are connected with a line to exactly one entity or relationship set.

ERD Software. Chen's notation

Example 1. Entity Relationship Software. Chen's notation

Another type of notation is known as Crow's Foot notation. Fundamentally it is very similar to Chen's notation and differs by designations, are used the boxes to represent entities and the lines between them to represent relationships. The attributes of entity are drawn in the box that represents this entity.

Entity Relationship Software. Crow's Foot notation

Example 2. Entity Relationship Software. Crow's Foot notation

The Entity-Relationship Diagram (ERD) solution provides templates and samples that allow you get closer with ER diagrams. All they are available for viewing and editing from ConceptDraw STORE.

Entity-Relationship Diagram (ERD) Solution in ConceptDraw STORE

Example 3. Entity-Relationship Diagram (ERD) Solution in ConceptDraw STORE


Entity relationship diagram (ERD) Libraries

There are also 2 libraries at the Entity-Relationship Diagram (ERD) solution with all necessary objects to produce your own ER diagram. You can simply drop desired of them into your document to quickly and easily create the diagram.

ERD libraries

Example 4. ERD Libraries

The Entity-Relationship Diagram (ERD) solution for ConceptDraw PRO helps you to produce the ER Diagrams that you can readily use to document databases in white papers, presentations, data sheets, posters, and technical materials.


Examples of Entity relationship diagram (ERD)

The Entity-Relationship Diagram (ERD) solution from ConceptDraw Solution Park extends ConceptDraw PRO vector graphics and diagramming software with the ability to describe a database using the Entity-Relationship model and offers a lot of examples that you can successfully use as the base for your own ERDs.

ERD Employee Certification entity

Example 5. Entity Relationship Diagram (ERD) Example - ERD Employee Certification Entity

Use ConceptDraw PRO software extended with Entity-Relationship Diagram (ERD) solution to draw your own ER diagrams using Chen's or Crow's foot notations without efforts.

Entity Relationship Software

Example 6. Entity Relationship Software (Mac OS X and Windows)

The following features make ConceptDraw PRO extended with the Entity-Relationship Diagram (ERD) solution the most effective Entity Relationship Software:

  1. You don't need to be an artist to draw professional looking diagrams in a few minutes.
  2. Large quantity of ready-to-use vector objects makes drawing your diagrams quick and easy.
  3. Extensive collection of pre-designed templates and samples give you a great start for your own diagrams.
  4. ConceptDraw PRO provides you with the possibility to use the grid, rules and guides. You can easily rotate, group, align, and arrange objects, and use different fonts and colors to make your diagram stand out.
  5. All ConceptDraw PRO documents are vector graphic files and are available for reviewing, modifying, and converting to a variety of formats: image, HTML, PDF file, MS PowerPoint Presentation, Adobe Flash, MS Visio.
  6. Using ConceptDraw STORE you can navigate through ConceptDraw Solution Park, managing downloads and updates. You can access libraries, templates and samples directly from ConceptDraw STORE.
  7. If you have any questions, our support is free of charge and always ready to come to your aid.






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TEN RELATED HOW TO's:

ConceptDraw PRO ER Diagram Tool

Database design is an important part of any project, as databases become more and more complex nowadays. To make the model more representative, entity relationship diagrams are widely used in software engineering area. These diagrams show sets of entities as rectangles connected via lines labeled with their cardinalities. This an example of the ER-diagram developed to store information regarding some online role-playing game. It includes three main elements of ER diagram: entities, relationships and attributes. The entities, attributes and relationships on this ER-diagram is depicted according to the Chen's notation. Chen's notation for Entity Relationship diagrams admits using of rectangles to depict entities, ovals for attributes and ,at least, diamonds to show relationships . ConceptDraw Entity-Relationship Diagrams solution was applied as ERD software to create this diagram.ER Diagram Tool. Chen ERD
Picture: ConceptDraw PRO ER Diagram Tool
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Martin ERD Diagram

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 PRO diagramming and vector drawing software. The Entity-Relationship Diagrams (ERD) solution is contained in the Software Development area of ConceptDraw Solution Park.Martin ERD Diagram - Sales
Picture: Martin ERD Diagram
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What illustrates a technical flow chart? Technical flow chart is a diagrammatic representation which visually illustrates the sequence of operations that must to be performed to get the problem's solution. ConceptDraw PRO enhanced with Flowcharts Solution from the "What is a Diagram" Area of ConceptDraw Solution is a perfect software for drawing Technical Flow Chart Example illustrating the essence and importance of the technical flow chart use.Technical Flow Chart Example
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Entity Relationship Diagram - ERD - Software for Design Crows Foot ER Diagrams

There are many ways to describe a database structure. One of the most usual is to draw an entity relationship diagram (ERD) using a Crow’s Foot notation to represent database elements. If you don’t want to draw it on paper, you should use an appropriate software. An entity-relationship (ER) diagram is used to show the structure of a business database. ERD represents data as objects (entities) that are connected with standard relationships symbols which Illustrate an association between entities. ERD, there is a wide range of ERD notations used by data bases architects for reflecting the relationships between the data entities. According to the crow’s foot notation relationships are drawn as single labeled lines designating a certain kinds of relationship. Crow foot notation is a most frequently used ERD standard, because of improved readability of diagrams, with a more accurate use of space on the page.Entity Relationship Diagram Software, Design Elements - Crows Foot (Windows, Macintosh)
Picture: Entity Relationship Diagram - ERD - Software for Design Crows Foot ER Diagrams
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Design Element: Chen for Entity Relationship Diagram - ERD

It is very difficult to get into database model idea without any examples. To create one, you can use Chen’s notation for Entity Relationship Diagrams (ERD) and try to see all the peculiarities yourself. This notation describes entities and relations as basic geometric shapes like rectangles and diamonds. Chen notation for Entity-relationship diagrams is used for designing relational databases. It depicts the database entities as a set of subjects. For example events, people, ideas, etc. All entities has common characteristics (attributes). Any object of the system is identified as the sole and unique. The name of entity should indicate the class or type of the the whole object, not a given example. The connection commonly represents a relationship between entities. Conceptdraw Entity-Relationship Diagrams (ERD) solution provides the libraries with ready-to-use ERD element fitting Chen's notation objects and relationships.ERD. Entity Relationship Diagram, Design Elements - Chen (Win Mac)
Picture: Design Element: Chen for Entity Relationship Diagram - ERD
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ERD Symbols and Meanings

A database is a data collection, structured into some conceptual model. Two most common approaches of developing data models are UML diagrams and ER-model diagrams. There are several notations of entity-relationship diagram symbols and their meaning is slightly different. Crow’s Foot notation is quite descriptive and easy to understand, meanwhile, the Chen notation is great for conceptual modeling. An entity relationship diagrams look very simple to a flowcharts. The main difference is the symbols provided by specific ERD notations. There are several models applied in entity-relationship diagrams: conceptual, logical and physical. Creating an entity relationship diagram requires using a specific notation. There are five main components of common ERD notations: Entities, Actions, Attributes, Cardinality and Connections. The two of notations most widely used for creating ERD are Chen notation and Crow foot notation. By the way, the Crow foot notation originates from the Chen notation - it is an adapted version of the Chen notation.Entity Relationship Diagram Symbols and Meaning - crow
Picture: ERD Symbols and Meanings
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Entity Relationship Diagram Examples

An abstract representation is usually the first thing you will need while developing a database. To understand the ways that databases are structured, you should look through entity-relationship diagram examples and see the notations features and attributes. With an entity-relationship model you can describe a database of any complexity. This Entity-relationship diagram is a tool for software developers. It enables every element of database to be managed, communicated and tested before release. This ERD was created using symbols advocated by Chen's notation. Because of a linguistic origin of the Chen’s notation, the boxes representing entities could be interpreted as nouns, and the relationships between them are in verb form, shown on a diagram as a diamond.Entity Relationship Diagram Examples
Picture: Entity Relationship Diagram Examples
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Entity Relationship Diagram Software Engineering

While designing a conceptual data model, you should use appropriate software. For instance, ConceptDraw PRO is a user-friendly ER diagram tool that has a lot of samples and templates to facilitate your work. A clear entity-relationship diagram helps to define the relations between system’s components. Software engineering is the section of a computer science engaged to design, realization, and support of complex software products. An ERD is a data modeling method that is widely applied in the software engineering practice. Commonly it is used for developing a structure of a a relational database. An entity relationship diagram is helpful for structuring and organizing databases that can be modeled using a relational structure. An entity relationship diagram is designed to depicts the interrelationships within the sets of entities which are accumulated in the database. Each entity represents a particular component of a data. Thus, ER diagrams depicts the logical structure of databases. ConceptDraw ER Diagrams solution provides software engineers with the professional tool for making entity-relationship diagrams.Entity Relationship Diagram Software Engineering
Picture: Entity Relationship Diagram Software Engineering
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