Developing Entity Relationship Diagrams
Entity Relationship diagrams are the powerful tool for clear and visual modeling the relationships between database entities. When developing Entity Relationship Diagrams are used a set of common block objects and lines to describe the structure of a database.
Use the ConceptDraw DIAGRAM software extended with Entity-Relationship Diagram (ERD) solution from the Software Development area of ConceptDraw Solution Park for designing ER diagrams, which offers the predesigned commonly used Entity relationship symbols and ER objects. Thanks to them you can make the ERDs easy understandable for all your colleagues.
Sample 1. Entity Relationship Diagram (ERD), crow's foot notation
How to Build an Entity Relationship Diagram
When you need to visually represent the structure of relational database, Entity relationship diagram (ERD) is the best type of diagram for that case.
Most entity-relationship diagrams can be built with objects from Flowchart solution or ERD Solution which contains inbuilt templates. Follow these steps to create your own custom ERD diagram.
Don't be frightened if it looks complex, ConceptDraw DIAGRAM makes it easy to create an ERD, and hundreds of other diagrams, in minutes.
- Start drawing with Entity object from Crow's foot ERD object.
Note: This object contains several levels:
1 - object itself
2 - lines in the object
3 - separate cell. - It is possible to set different setting to each level.
- To switch from level to level, click on object with separate clicks when it's selected.
- Add text.
- Change object's color.
- Copy Teachers table.
- Add new rows via drop-down menu.
Note: Adding and removing is always performed from a bottom row. - New added row will have same preferences as bottom one.
- Paste copied table as many times as you need.
- Filling the table.
Note: To fill a separate cell, select it clicking with 3 separate clicks. - Delete excess rows via drop-down menu for each table.
- Use M:1 (many-to-one) connector from ERD Crow’s Foot Notation library.
- Connect needed rows of tables.
- If you want to change connectors' type, select all connectors with held Shift button and click on Smart connector icon at ribbon.
- To change connectors' elbow position, pull the yellow control dot.
- Select tables from left and set the same distribution.
- You may block the horizontal moving for object, so figure might be moved only vertically.
- Use M:M (many-to-many) connector from ERD Crow’s Foot Notation library.
- Set the needed connection.
Note: When connector's end reaches connection point, it changes its appearance.
- Edit connector's path manually with yellow control dots.
- Select all with command+A.
- Inspectors - Line - remove object lines (stroke).
- Export your document to one of graphic formats.
- Set the format and quality.
- Your file is ready!
The Entity-Relationship Diagram (ERD) solution from ConceptDraw Solution Park extends ConceptDraw DIAGRAM ector graphics and diagramming software with the ability to describe successfully a database using the Entity-Relationship model and easy create ERD.
Video. How to Build an Entity Relationship Diagram (2min 05sec)
Use ConceptDraw DIAGRAM enhanced with Entity Relationship Diagram (ERD) solution to draw you own ER diagrams using Chen's or Crow's Foot notations.
Related Solution:
TEN RELATED HOW TO's:
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.
Picture: ERD Symbols and Meanings
Related Solution:
How To Create Restaurant Floor Plan in Minutes
As restaurant industry is growing rapidly nowadays, researches show that almost half of the adults have worked in a restaurant or a cafe. Moreover, many of them dream to start their own someday. Unfortunately, it takes a lot of time to write a business plan and to find a great location, although some know how to create a restaurant floor plan in minutes or how to plan budget effortlessly. Hiring employees can also cause a lot of headache, but this is crucial for further success, because every guest comes to restaurant for a good service and delicious food. It is also worth noting that restaurant concept is also important, because it defines target audience and influences the menu. This diagram represents the floor plan of an ongoing sports-theme establishment - restaurant, cafe, or other food service. A number of widescreen monitors installed along the perimeter provide visitors the opportunity to follow the course of a match from anywhere in the dining room of restaurant or cafe. The most of sports fans believe that food and alcohol is a big part of any sports show. That is why the dining room takes the most space - almost 60% of the total establishment space. Nearly all sports fans consume beverages while watching sports - beer, soda or water at least. Thus, the restaurant floor plan designers added a large lavatory there. Moreover, project developers considered unnecessary the gender division of such delicate place - perhaps they guess that only men are watching football, or believe that alcohol will eliminate the most of gender differences.
Picture: How To Create Restaurant Floor Plan in Minutes
Related Solution:
DFD Library System
The diagrams with highest level in the hierarchy define the main processes or subsystems with external and internal data sources. To detail them, DFD Library is used to build a system of lower level diagrams. This decomposition continues hereinafter it is meaningless.
Picture: DFD Library System
Related Solution:
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.
Picture: Entity Relationship Diagram Examples
Related Solution:
UML Diagram of Parking
This sample shows the Use Case Diagram of parking lot control system. On this sample you can see use cases represented as ovals and three actors represented as figures of persons that employ these use cases. Associations between actors and use cases are shown as lines. UML Diagram of Parking - This diagram can be used for understanding the process of working the car parking, at the projection and construction the parking by building companies and for automation the existing parkings.
Picture: UML Diagram of Parking
Related Solution:
Process Flowchart
When trying to figure out the nature of the problems occurring within a project, there are many ways to develop such understanding. One of the most common ways to document processes for further improvement is to draw a process flowchart, which depicts the activities of the process arranged in sequential order — this is business process management. ConceptDraw DIAGRAM v12 is business process mapping software with impressive range of productivity features for business process management and classic project management. This business process management software is helpful for many purposes from different payment processes, or manufacturing processes to chemical processes. Business process mapping flowcharts helps clarify the actual workflow of different people engaged in the same process. This samples were made with ConceptDraw DIAGRAM v12 — business process mapping software for flowcharting and used as classic visio alternative because its briefly named "visio for mac" and for windows, this sort of software named the business process management tools. This flowchart diagram shows a process flow of project management. The diagram that is presented here depicts the project life cycle that is basic for the most of project management methods. Breaking a project into phases allows to track it in the proper manner. Through separation on phases, the total workflow of a project is divided into some foreseeable components, thus making it easier to follow the project status. A project life cycle commonly includes: initiation, definition, design, development and implementation phases. Distinguished method to show parallel and interdependent processes, as well as project life cycle relationships. A flowchart diagram is often used as visual guide to project. For instance, it used by marketing project management software for visualizing stages of marketing activities or as project management workflow tools. Created with ConceptDraw DIAGRAM v12 — business process mapping software which is flowcharting visio alternative or shortly its visio for mac, this sort of software platform often named the business process management tools.
Picture: Process Flowchart
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 v12 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.
Picture: Entity Relationship Diagram Software for Mac
Related Solution:
Chen ERD Diagram
The vector stencils library Chen ERD from the solution Entity-Relationship Diagrams (ERD) contains specific symbols of the Chen ERD notation including entity symbols and relationship symbols for ConceptDraw DIAGRAM v12 diagramming and vector drawing software. The Entity-Relationship Diagrams (ERD) solution is contained in the Software Development area of ConceptDraw Solution Park.
Picture: Chen ERD Diagram
Related Solution:
CORRECTIVE ACTIONS PLANNING.Risk Diagram (PDPC)
Risk Diagram (PDPC) - ConceptDraw Office suite is a software for Risks Diagram making. This diagram identifies possible risks in accomplishing corrective actions. With the Risks Diagram, one analyzes each action separately in a tree of all actions and develops a preventive action in response of each potential obstacles or circumstances which may be a risk.
Picture: CORRECTIVE ACTIONS PLANNING.Risk Diagram (PDPC)
Pyramid Diagram
When thinking about the process of decision making, it's easy to imagine it as a pyramid. We will look at a three level pyramid model as an example. Operational decisions are first that come to mind, and it's the first level. Tactical and strategic decisions are the second and the third levels. Pyramid (triangle) diagrams are used to show some hierarchical data. Because to the pyramid form of diagram, each diagram slice has a different width. The width of each segment depends on its hierarchical level. The current image illustrates the model of information system types. Most graphically the model can be represented as a three level pyramid. The first level shows a system of transaction processing It is concentrated on operational tasks. The second level is devoted to tactical solutions of the information system management. And at least, the third level addresses strategy and represents the executive information system. This three level pyramid sample is supplied with the ConceptDraw Pyramid Diagrams solution from Marketing area of ConceptDraw Solution Park.
Picture: Pyramid Diagram
Related Solutions: