E R Diagramm. Components of er diagram an er diagram is mainly composed of following three components. Er diagrams are most often used to design or debug relational databases in the fields of software engineering business information systems education and research.
You can use so popular chen s notation to represent all components of database and their relationships on the er diagram. At first look an er diagram looks very similar to the flowchart. First er diagrams are easy to understand and do not require a person to undergo extensive training to be able to work with it efficiently and accurately.
You can use so popular chen s notation to represent all components of database and their relationships on the er diagram.
Er diagrams are created based on three basic concepts. This notation was developed and implemented by peter chen in 1976. Er diagrams contain different symbols that use rectangles to represent entities ovals to define attributes and diamond shapes to represent relationships. Er diagrams are used to sketch out the design of a database.
