Complexity of databases increases day by day, due to this the Entity relationship models and E-R diagrams become more and more popular, and now are an important part of database design. E-R diagrams allow visually and graphically represent structure and design of databases.
You can use so popular Chen's notation to represent all components of database and their relationships on the ER diagram. This notation was developed and implemented by Peter Chen in 1976. The main components of the E-R diagrams are:
- attributes that describe these entities,
- relationships among these entities that describe associations between the data,
- cardinalities that describe the number of relationship participants: one-to-many (1:M), many-to-many (M:N), and one-to-one (1:1).
In a Chen's notation, entities are represented by rectangles on the diagram with the entity names written inside and relationships are represented by diamonds. Another popular type of E-R diagrams is known as Crow's Foot notation that is derived from the Chen's notation.
Example 1. E-R Diagram - Students and teachers
Use of ConceptDraw DIAGRAM for professional ERD drawing includes using the predesigned components of ER diagram, such as entity relationship symbols, work flow shapes, entity relationship stencils. All they are provided for easy use by 2 libraries of Entity-Relationship Diagram (ERD) Solution from the Software Development Area for ConceptDraw Solution Park.
Example 2. ERD Libraries
There is also wide collection of predesigned E-R Diagrams which is represented at ConceptDraw STORE. All E-R Diagrams samples and templates are well thought-out, professionally designed, can be easy changed according to your needs and further successfully used.
Example 3. E-R Diagrams in ConceptDraw DIAGRAM
The following features make ConceptDraw DIAGRAM extended with the Entity-Relationship Diagram (ERD) solution the most effective E-R diagrams design software:
- You don't need to be an artist to draw professional looking diagrams in a few minutes.
- Large quantity of ready-to-use vector objects makes drawing your diagrams quick and easy.
- Extensive collection of pre-designed templates and samples give you a great start for your own diagrams.
- ConceptDraw DIAGRAM 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.
- All ConceptDraw DIAGRAM 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.
- 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.
- If you have any questions, our support is free of charge and always ready to come to your aid.
TEN RELATED HOW TO's:
Sometimes, when it is difficult to create a functional space plan or to rearrange existing one, the art of interior design comes in. It doesn't matter, if you need a cozy bedroom or an office layout plan, you should use appropriate tools to make your design great.
While making a floor plan of a new office it could be useful to apply some design elements such as furniture and office equipment. This diagram presents an office furniture objects that can be used for office interior design planning, or making office furniture and equipment layouts. This vector stencils library is supplied with ConceptDraw Office Layout Plans solution. It contains more then 30 vector objects of office interior for making office floor plans including an office space layout plans and furniture arrangement.
Picture: Interior Design. Office Layout Plan Design Element
Since the most applications keep their data in databases, the database design and database modeling play highly important role during the process of applications development. The ConceptDraw DIAGRAM software enhanced with EXPRESS-G data Modeling Diagram solution perfectly suits for construction the database models and designing the Database model diagram using EXPRESS-G notation, for representing the data structures required to design and create the databases permitting to retrieve and write data quickly.
Picture: Database Model Diagram
Jackson System Development (JSD) is a linear method of system development created by Michael A. Jackson and John Cameron in the 1980s. It comprises the whole software life cycle directly or providing a framework for more specialized techniques.
When implementing the Jackson System Development method and designing JSD diagrams, you can succesfully use the powerful and helpful tools of ConceptDraw DIAGRAM software extended with Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park.
Picture: JSD - Jackson system development
This method of problem analysis is widely used in IT, manufacture industries and chemical engineering. If you want to take a fresh look on your problem, you can draw a fishbone diagram with ConceptDraw DIAGRAM software, which supports both MAC OS and Windows. You can see and download fishbone diagram samples and templates in ConceptDraw Solution Park.
This Fishbone (Ishikawa) diagram can be applied as template for performing the cause and effect analysis of a service industry problems. It can help to determine factors causing problems. Causes in this diagram are categorized according to the 4S’s principle that means Surroundings, Suppliers, Systems and Skills. Grouping causes allows to reveal main interactions between different events. This diagram was made using ConceptDraw Fishbone diagrams solution. It can help to reveal the causes effected a complicated issue. Of course it can be used together with other methods of approaching to the problem solving.
Picture: Draw Fishbone Diagram on MAC Software
ConceptDraw DIAGRAM diagramming and vector drawing software extended with Directional Maps Solution from the Maps Area of ConceptDraw Solution Park is a powerful maps and directions design software. Let's review the tools of this solution.
Picture: Maps and Directions
When thinking about data visualization, one of the first tools that comes to mind is a flowchart design. You can find flowchart symbols, shapes, stencils and icons easily on the Internet, but it might take time to systematize this information. Nevertheless, once you start flowcharting, you’ll love its simplicity and efficiency.
This diagram consists from standard flowchart symbols, approved by ANSI (American National Standard Institute) for drawing flowcharts. A flowchart is a diagram that represents a step-by-step algorithm of any process, displaying the process stages as boxes that are connected with arrows. Flowchart design makes it clear and readable.
Flowchart designed using ConceptDraw DIAGRAM flowchart software allows to make attractive and clear process presentation, it makes interpretation of the business process flow fresh and versatile. Great flowchart design view is a big advantage over the diagram created manually on a paper.
Picture: Flowchart design. Flowchart symbols, shapes, stencils and icons
The Sales Process is a complex approach for selling a product or service which assumes many steps including the sales planning, realization of the sales marketing and management strategies, sales process analysis, etc. Now we have a ConceptDraw DIAGRAM software extended with unique Sales Flowcharts solution from the Marketing area of ConceptDraw Solution Park which ideally suits for the planning and realization the company's sales process.
Picture: The Sales Process