An entity type is defined in ER diagrams as a rectangular box enclosing the entity type name. Attributes name are attached in ovals and are connected to their entity type by using straight lines. https://www.ducatindia.com/datascienceusingpython

1. Components of
an ER Diagram
CONTACT:-
70-70-90-50-90
INFO@DUCATINDIA.COM
WELCOME TO DUCAT INDIA

2. An ER Diagram includes the following components:-
- Entity
- Attributes
- Relationships
Entity
An entity is a person, place, element, event, or idea about which information is recorded. In an entity-
relationship diagram, an entity is described by using a rectangle.
Some of the examples of the entities are given below

3. Person:
STUDENT, PATIENT, EMPLOYEE, DOCTOR, ENGINEER
Place:
CITY, COUNTRY, STATE
Event:
SEMINAR, SALE, RENEWAL, COMPETITION
Object:
BUILDING, AUTOMOBILE, MACHINE, FURNITURE, TOY
Concept:
COURSE, ACCOUNT, TRAINING CENTRE, WORK
CENTRE

4. Entity Types
An entity is represented as a collection of entities that have similar attributes. For instance, an employee in a company
database. The employee entities share similar attributes, however, such an entity has its value for each attribute. The entity
type, the employee, is display in the figure:

5. An entity type is defined in ER diagrams as a rectangular box enclosing the entity type name. Attributes name are
attached in ovals and are connected to their entity type by using straight lines as display in fig:
Entity Set
The collection of all entities of a specific entity type inside the database at any point in time is known as an entity
set. It is also referred to as the extension of the entity type.

6. THANK YOU
CONTACT:-
70-70-90-50-90
info@ducatindia.com