1.

Explain any three components of E-R diagram.

Answer»

The three main components of E-R diagram are Entity, Attribute, and Relationship.

1. Entity:

An entity is a person, place, thing or event for which data is collected and maintained.

2. Attribute:

An attribute is the characteristic property of an existing entity.

3. Relation:

A relation is defined as a set of tuples that have the same attributes. A relation is usually described as a table, which is organized into rows and columns.



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