The importance of entity relationship diagrams in database design

Entity relationship diagram treats the real world as entities. It was proposed by P.P.Chen in 1976 and is known as ER diagram, ER model, etc.

The importance of entity relationship diagrams is explained below -

Assist database developers

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ER diagrams can help with design before you even start building tables.

Requirements Collection

This helps the user plan how to organize the data.

Documentation Tool

ER diagram can be used as a document to let others understand the core of the database.

The logic of the database

It conveys the logical structure of the database to the user.

Blueprint

The ER diagram is considered the blueprint of the database.

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