Entity Relationship Diagram - ERD - Software for Design
Crows Foot ER Diagrams
ER-model is used in a high-level (conceptual) design databases. You can use it to identify key entities and designate connections that can be established between these entities. During database design the ER model is converted into specific database scheme based on the selected data model (relational, objective, networking, or any other).
Crow's Foot notation was proposed by Gordon Everest, originally called Inverted Arrow. According to this notation, the entity is represented by rectangle containing its name. Name of the entity must be unique within this model. In this case, the name of the entity is a name of type, rather than a specific instance of this type. A concrete representative of the entity is called by the entity instance.
The entity attributes are written inside the rectangle depicting entity. Among the attributes is also highlighted the entity key - the set of attributes the values of which in aggregate are unique for each instance of the entity.
Relation is depicted by line which ties two entities involved in a relationship. The plurality of the relationship is indicated graphically by a "plug" on the end of the link. Optionality of a link is marked by a circle at the end of the link.
Entity-relationship diagrams based on both Chen's and Crow's Foot notations, can be easily drawn using the ConceptDraw DIAGRAM ERD diagrams software tools for design element Crow's Foot and Chen from Entity-Relationship Diagram (ERD) solution.
ERD Crow's Foot library from Entity-Relationship Diagram (ERD) solution contains 17 Crow's Foot notation symbols.
Example 1. Crow's Foot notation symbols
The shapes which include circles, bars, and symbols, indicate various possibilities. A single bar at Crows foot notation indicates one, a double bar indicates one and only one, a circle indicates zero, and a crow's foot indicates many.
Entity Relationship Diagrams (ERD) illustrates the logical structure of databases. The vector graphic diagrams produced when using the ConceptDraw ERD solution can be successfully used in whitepapers, presentations, datasheets, posters, or any technical materials.
Example 2. Entity Relationship Diagram Software
Design Elements — Crow's Foot (Windows, Macintosh).
The samples you see on this page were created in ConceptDraw DIAGRAM software in macOS and Windows using the Entity-Relationship Diagram (ERD) solution and show the ER Diagrams created with Crow's Foot notation. An experienced user spent 10 minutes creating each of these samples.
Use the Entity-Relationship Diagram (ERD) Solution for ConceptDraw DIAGRAM to create quick and easy your own Entity-Relationship Diagrams using the Crow's Foot and Chen's notations.
Example 3. Entity-Relationship (ERD) Diagram Solution
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 users.
NINE RELATED HOW TO's:
You are probably familiar with diagrams. But have you ever thought that they are useless? This article will explain you why.
Picture: Diagrams Mean Nothing
Describing a workflow or approval process can take hours and be too complicated, especially since there are options to do it quickly and vividly. Diagrams called flowcharts replace long paragraphs of boring text and represent information in a graphic way. You can draw one on paper or you can use flowchart software to do it quickly and scalable. This kind of software is easy to use and you don’t need any special skills to start using it. In addition, there are a lot examples and predesigned templates on the Internet.
Flowcharts are a best tool for staking out a huge and complex process into some small readable parts. Surely, flowcharts can be drawn manually but the use of standard symbols that make it clear for a wide audience makes a software tool preferred for this task. The core for a successful flowchart is its simplicity. That is why often before beginning making flowchart through software, people draw the sketch on a piece of paper. Designing an effective flowchart means the combination of the data needed to be shown and the simplicity with which you depict it.
Picture: Flowchart Software
A workflow diagram is less general notation than a process flow diagram. Workflow as a term can apply to organizational process which involves people, resources, documents, sort of data, for instance; whereas a process is general collection of steps occuring in any sort of activity. That is why process flow diagram can be used as workflow diagram to describe business process, data flow or department interactions.
The fastest way to create a workflow diagram is using pre-designed workflow template. ConceptDraw DIAGRAM with the Workflow Diagrams solution delivers rich set of workflow diagram templates you may start from.
Picture: How To Create a Workflow Diagram
ConceptDraw DIAGRAM extended with Data Flow Diagrams solution is the best diagramming and vector drawing software for quick and easy designing the Data Flow Diagram Example of any complexity.
Picture: Data Flow Diagram Example
ConceptDraw DIAGRAM is a powerful diagramming and vector drawing software. Extended with Windows 8 User Interface solution from the Software Development area, ConceptDraw DIAGRAM became the ideal software for prototype and design professional looking user interfaces for Windows 8 and Windows 8.1. Windows 8 User Interface solution offers you wide variety of user interface design examples, templates and samples.
Picture: User Interface Design Examples
Do you like the professional schemes that you can find on the Internet? Take into account that the most part of them is made using the Best Flowchart Software and Flowchart Symbols. Try you own powers in creating such diagrams!
Flowcharts are the most business diagramming tool. If you are a business manager, you can use flow chart to depict work flow in your organization, develop the effective organizational structure and present the information to investors or other stakeholders. Combining the smart management solutions with ConceptDraw DIAGRAM diagramming engine delivers the set of comprehensive flowchart tools necessary to support professionals in their creativeness and business activity.
Picture: Best Flowchart Software and Flowchart Symbols
Choose the business illustration design you love best, and sign our design your own style with Business and Finance Illustrations library from ConceptDraw DIAGRAM.
The Business and Finance solution contains 12 vector clipart libraries: Advertising, Business, Business people clipart, Business people figures, Currency, Mail and post, Management, Marketing, Money, Office, Project management, Time
Picture: Business and Finance Illustrations
How to Draw ER Diagrams? With Entity-Relationship Diagram (ERD) solution from the Software Development Area for ConceptDraw Solution Park you are able to draw ER diagram with no problem. It includes 45 predesigned icons advocated by popular Chen's and Crow’s Foot notations that can be used when describing an enterprise database.
Picture: How to Draw ER Diagrams