11-18-2014, 02:45 PM
Entity-Relationship Diagram (ERD)
An entity-relationship diagram (ERD) is a data modeling technique that graphically illustrates an information system’s entities and the relationships between those entities. An ERD is a conceptual and representational model of data used to represent the entity framework infrastructure.
The elements of an ERD are:
Entities
Relationships
Attributes
Steps involved in creating an ERD include:
Identifying and defining the entities
Determining all interactions between the entities
Analyzing the nature of interactions/determining the cardinality of the relationships
Creating the ERD
An entity-relationship diagram (ERD) is a data modeling technique that graphically illustrates an information system’s entities and the relationships between those entities. An ERD is a conceptual and representational model of data used to represent the entity framework infrastructure.
The elements of an ERD are:
Entities
Relationships
Attributes
Steps involved in creating an ERD include:
Identifying and defining the entities
Determining all interactions between the entities
Analyzing the nature of interactions/determining the cardinality of the relationships
Creating the ERD
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