An Attribute Is A In A Relation

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An Attribute Is A In A Relation

An attribute is a characteristic of an entity or relationship type that is of interest to the organization. It is a property or descriptor of an entity or relationship type that is used to describe the entity or relationship type. An attribute is a named column of a table that contains data values for each row in the table. The values in an attribute column are all of the same data type.

In a relational database, an attribute is a named column of a table. Each row in the table represents an instance of the entity type or relationship type represented by the table. The values in each column represent the values of the attributes for that instance.

Attributes can be classified as simple or composite. A simple attribute is an attribute that cannot be divided into smaller components. A composite attribute is an attribute that can be divided into smaller components.

Attributes can also be classified as single-valued or multi-valued. A single-valued attribute is an attribute that has only one value for each instance of the entity or relationship type. A multi-valued attribute is an attribute that can have more than one value for each instance of the entity or relationship type.

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Attributes can also be classified as stored or derived. A stored attribute is an attribute whose value is stored in the database. A derived attribute is an attribute whose value is derived from other attributes.

In summary, attributes are characteristics of entities and relationship types that are used to describe them. They are named columns of tables in a relational database and can be classified as simple or composite, single-valued or multi-valued, and stored or derived.

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– [https://www.geeksforgeeks.org/attributes-in-dbms/](https://www.geeksforgeeks.org/attributes-in-dbms/)
– [https://www.tutorialspoint.com/dbms/dbms_attributes.htm](https://www.tutorialspoint.com/dbms/dbms_attributes.htm)
– [https://www.javatpoint.com/dbms-attributes](https://www.javatpoint.com/dbms-attributes)

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