An Entity Relationship Diagram shows the relationship of entity sets stored in a database. An entity in this context is an object, a component of data.
An entity set is a collection of similar entities. These entities can have attributes that defines its properties.
By defining the entities, their attributes and showing the relationship between them, an E-R diagram
illustrates the logical structure of databases.
E-R diagrams are used to sketch out the design of a database.
An entity set is a collection of similar entities. These entities can have attributes that defines its properties.
By defining the entities, their attributes and showing the relationship between them, an E-R diagram
illustrates the logical structure of databases.
E-R diagrams are used to sketch out the design of a database.
