Concept of entity-relationship diagrams and their components

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What is an entity-relationship diagram? What are the different components of an entity relationship diagram? What are the advantages of using an ER Diagram?

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Answered By 5 points N/A #183236

Concept of entity-relationship diagrams and their components

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An ER Diagram is a type of diagram used to denote the basic structure of a database. It is essential for organizing data that can be input into a database. The main components of an ER Diagram are: attributes, entities and relationships. Entities are the things for which we make an ER Diagram. Attributes are the parts included in the entities. They define the features of the entity. Relationships are the mode of connectivity between two entities. An ER Diagram is useful for making a relational database as it tells about the basic structure of that DB. This makes construction the database easier. It is basically the blueprint of schema of that database.

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