In this Business Analysis Training, you will learn ER Diagrams. Topics covered in this session are: • Entity and Relationship • ER Components • Association • Cardinality • One To One (1 : 1) • One To Many Relation Ship (1 : N ) • Many to One Relation Ship (N : 1) • Many To Many Relation Ship ( M : N ) • E-R Dig Of Banking Enterprise For more information, click on this link: https://www.mindsmapped.com/courses/business-analysis/fundamentals-of-business-analysis/

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Business Analysis
Training
ER Diagrams

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Agenda
• Entity and Relationship
• ER Components
• Association
• Cardinality
• One To One (1 : 1)
• One To Many Relation Ship (1 : N )
• Many to One Relation Ship (N : 1)
• Many To Many Relation Ship ( M : N )
• E-R Dig Of Banking Enterprise

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Entity and Relationship
• Entity - It’s Real time Object Any Thing In The World.
Ex : Pen, Pencil, Book, Fan, Man
• Attribute : Properties Of That Entity Is Called as Attribute.
Ex : Color, Size, length, width
• Relationship : Maintain The Relation Ship Between 2 Entity sets.
• Attribute Types:
• Simple & Composite Attributes : Name( First , Middle, last Names)
• Single & Multi Valued Attributes : Contact Number ( Country Code,
Area code , Number)
• Derived Attributes : It Can Be Computed From others : (Age, Date Of
Birth)

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ER Components
• Entity – Rectangle
• Attribute - Eclipse
• Relationship - Diamond
• Multi Valued Attributes – Double Eclipse
• Derived Attributes –
• Weak Entity Set –
• Connectors -

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faculty
Teaches
Guides
Mentors
student
Association between 2 objects is cardinality
Association

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Cardinality
No Of occurrences of an object related to number of occurrences of other
objects.
• 1:1 (SSN and US citizen OR Person and Car)
• 1:M ( Order and Items – One order has many items)
• M:1 (Emp and Dept)
• M:M (Faculty and Students OR Loans and customer)

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One Citizen can have utmost 1 SSN
1 SSN is associated with NOT more than 1
Citizen SSNAssociates
One To One (1 : 1)

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Order
Items
Works
In
One To Many Relation Ship (1 : N )

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EMP
DEPT
Works
In
Many to One Relation Ship (N : 1)
• One Employee Works In At Most One Dept
• One Dept Can Have Many Employees

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Faculty Studentteaches
Many To Many Relation Ship ( M : N )
• One Faculty teaches Many Students
• One Student is taught by many teachers in a school

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ACCOUNT BRANCH
CUSTOMER LOAN
ACCOUNT
-BRANCH
Deposit
or
Loan-
Branch
Borrow
Account
-No
Account
-Name
Branch
-No B-City
C-
Name
C-
Address
Loan-
No
Amount
E-R Dig Of Banking Enterprise

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Thank you!