What is the difference between entity, entity set and attribute in SQL?

Question

DBMS (Sql)

Answer 1

Entity is a real world object , whereas entity set is a collection of more than one entities.
And attribute is the property or a behaviour an entity posess.

For e.g. In college , B.tech is an entity,
whereas B.Sc,B.com ,MBA and B.tech combines to form an entity set.

Now B.tech have these things like Stream(civil,mechanical,Cs etc),
Subjects, projects etc.these are called Attributes.

A basic knowledge of entity,entity set and attributes is necessary in making E-R Diagram which is further significant when you are working on some project and you have to show the basic functionalities of your project.

Answer 2

An entity is a table or object that can be distinguished from other

An entityset is a collection of entities of same table type

Attribute is a column in a relation

A relation must contain minimum of 1 attribute or multiple attributes based upon customer request

Answer 3

In basic knowledge in SQL data base manipulation system

Answer 4

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