The document presents a detailed overview of Entity Relationship Diagrams (ERDs) used in data modeling, outlining their components such as entities, attributes, and relationships. It includes specific data types for various user-related entities, courses, and content. The slides also highlight the structure and symbols associated with ERDs.

1. There is no limit to learn
mar
iSchool
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16 Jan,2018

2. MD. Abdullah Al Nasim
15.01.04.085
Masud Rana
15.01.04.090
Sarwar Saif
15.01.04.091
Samiur Rahman
15.01.04.092
Presented By
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16 Jan,2018

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12 Dec,2017
ERD ?
WHAT IS
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16 Jan,2018

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A diagram used to conduct data
modeling activity
Describes the relationship between
data and object
Entity Relationship Diagram

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12 Dec,2017
COMPONENTS ?
WHAT ARETHE
Slide | 5
16 Jan,2018

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12 Dec,2017
Entity
Attribute
Relationship
Components of ERD
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16 Jan,2018

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12 Dec,2017
ENITY SETS ?
WHAT ARETHE
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16 Jan,2018

8. User
Information
Course
Content
Tutor
Comment
Entity Sets
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12 Dec,2017
RELATIONSHIPS?
WHAT ARETHE
Slide | 9
16 Jan,2018

10. Has
Tutor review
Takes
Course-content
User review
Relationships
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16 Jan,2018

11. ATTRIBUTES
and
DATA TYPES?
WHAT ARETHE
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Attributes and Data type of User
UserId int(11)
UserName varchar(32)
Email varchar(32)
Status varchar(32)
Accesskey varchar(32)
Time datetime
Password varchar(32)

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16 Jan,2018
Attributes and Data type of Information
UserId int(11)
FirstName varchar(16)
LastName varchar(16)
DateOfBirth date
Gender varchar(6)
Creationdate datetime

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16 Jan,2018
Attributes and Data type of Course
CourseId int(11)
CourseName varchar(255)
CourseHour int(5)
CourseDept varchar(32)

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16 Jan,2018
Attributes and Data type of Content
ContentId int(11)
ContentTitle varchar(255)
ContentType varchar(32)
ContentUrl varchar(255)
ContentSummary varchar(255)

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16 Jan,2018
Attributes and Data type ofTutor
TutorId int(11)
TutorName varchar(32)
AccessId varchar(32)
TakenCourse int(11)

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16 Jan,2018
Attributes and Data type of Comment
Id int(11)
Commentdata varchar(255)

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Attributes and Data type of User Review
UserId int(11)
Id int(11)
Time datetime
Commentdata comment

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Attributes and Data type ofTakes
UserId int(11)
CourseId int(11)
Grade varchar(16)

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16 Jan,2018
Attributes and Data type of Contentcourse
ContentcourseId int(11)
CourseName varchar(255)
ContentName varchar(255)

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Attributes and Data type ofTutorReview
Id int(11)
Tutor-id int(11)
Time datetime
Comment-data varchar(255)

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16 Jan,2018
Attributes with Symbols
Simple Attribute:
Composite Attribute:
Derived Attribute:
Multivalued Attribute:
( )

23. Enity Relationship Diagram (ERD)
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24. T H A N K
Y O U
F O R
E V E R Y T H I N G

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16 Jan,2018