Main menu

Media Coverage

<div class="small-4 columns">media 1</div>

<div class="small-4 columns">media 2</div>

<div class="small-4 columns">media 3</div>

Reach to Us

Key Attribute

Key Attribute

Key Attribute : Key is an attribute or collection of attributes that uniquely identifies an entity among entity set.

For example, the roll_number of a student makes him/her identifiable among students.

Super Key − A set of attributes (one or more) that collectively identifies an entity in an entity set.

Candidate Key − A minimal super key is called a candidate key. An entity set may have more than one candidate key.

Primary Key − A primary key is one of the candidate keys chosen by the database designer to uniquely identify the entity set.

Contributor's Info

Created:
0Comment