SlideShare a Scribd company logo

Er model ppt

Pihu Goel
Pihu Goel

DBMS

1 of 19
Download to read offline
ENTITY RELATIONSHIP MODEL
DBMS
Presented By : Shatakshi Agarwal
CONTENT
DBMS
About – ER model
Example
Components:
Entity
Attribute
Relationship
DBMS-
A database management system (DBMS) is
system software for creating and managing
databases. The DBMS provides users and
programmers with a systematic way to
create, retrieve, update and manage data
About–ER.MODEL
Entity relationship model also called e-r model and it
is a high level model.
This model is used to define the data elements and
relationship for a specified system.
It develops a conceptual design for the database. It
also develops a very simple and easy to design view of
data.
In ER modeling, the database structure is portrayed
as a diagram called an entity-relationship diagram.
EXAMPLE -
ComponentofERDiagram-

Recommended

Entity Relationship Diagram
Entity Relationship DiagramEntity Relationship Diagram
Entity Relationship DiagramShakila Mahjabin
 
2. Entity Relationship Model in DBMS
2. Entity Relationship Model in DBMS2. Entity Relationship Model in DBMS
2. Entity Relationship Model in DBMSkoolkampus
 
Relational algebra ppt
Relational algebra pptRelational algebra ppt
Relational algebra pptGirdharRatne
 
FUNCTION DEPENDENCY AND TYPES & EXAMPLE
FUNCTION DEPENDENCY  AND TYPES & EXAMPLEFUNCTION DEPENDENCY  AND TYPES & EXAMPLE
FUNCTION DEPENDENCY AND TYPES & EXAMPLEVraj Patel
 
SQL - Structured query language introduction
SQL - Structured query language introductionSQL - Structured query language introduction
SQL - Structured query language introductionSmriti Jain
 
Dbms Notes Lecture 9 : Specialization, Generalization and Aggregation
Dbms Notes Lecture 9 : Specialization, Generalization and AggregationDbms Notes Lecture 9 : Specialization, Generalization and Aggregation
Dbms Notes Lecture 9 : Specialization, Generalization and AggregationBIT Durg
 

More Related Content

What's hot (20)

joins in database
 joins in database joins in database
joins in database
 
DBMS Keys
DBMS KeysDBMS Keys
DBMS Keys
 
Data Modeling PPT
Data Modeling PPTData Modeling PPT
Data Modeling PPT
 
Inheritance in c++
Inheritance in c++Inheritance in c++
Inheritance in c++
 
Er diagrams presentation
Er diagrams presentationEr diagrams presentation
Er diagrams presentation
 
Relational Data Model Introduction
Relational Data Model IntroductionRelational Data Model Introduction
Relational Data Model Introduction
 
Types Of Keys in DBMS
Types Of Keys in DBMSTypes Of Keys in DBMS
Types Of Keys in DBMS
 
Dbms relational model
Dbms relational modelDbms relational model
Dbms relational model
 
Basic concept of OOP's
Basic concept of OOP'sBasic concept of OOP's
Basic concept of OOP's
 
Dbms architecture
Dbms architectureDbms architecture
Dbms architecture
 
Basic DBMS ppt
Basic DBMS pptBasic DBMS ppt
Basic DBMS ppt
 
Database Management System ppt
Database Management System pptDatabase Management System ppt
Database Management System ppt
 
DATABASE CONSTRAINTS
DATABASE CONSTRAINTSDATABASE CONSTRAINTS
DATABASE CONSTRAINTS
 
Rdbms
RdbmsRdbms
Rdbms
 
SQL(DDL & DML)
SQL(DDL & DML)SQL(DDL & DML)
SQL(DDL & DML)
 
Database Management System
Database Management SystemDatabase Management System
Database Management System
 
Integrity Constraints
Integrity ConstraintsIntegrity Constraints
Integrity Constraints
 
3 Level Architecture
3 Level Architecture3 Level Architecture
3 Level Architecture
 
1. Introduction to DBMS
1. Introduction to DBMS1. Introduction to DBMS
1. Introduction to DBMS
 
Database Management System
Database Management SystemDatabase Management System
Database Management System
 

Similar to Er model ppt

Similar to Er model ppt (20)

rdbmsdol.pptx
rdbmsdol.pptxrdbmsdol.pptx
rdbmsdol.pptx
 
rdbmsdol.pptx
rdbmsdol.pptxrdbmsdol.pptx
rdbmsdol.pptx
 
ER Diagram_Kameshwari.docx
ER Diagram_Kameshwari.docxER Diagram_Kameshwari.docx
ER Diagram_Kameshwari.docx
 
E_R-Diagram (2).pptx
E_R-Diagram (2).pptxE_R-Diagram (2).pptx
E_R-Diagram (2).pptx
 
Advantages and disadvantages of er model in DBMS. Types of database models ..
Advantages and disadvantages of er model in DBMS. Types of database models ..Advantages and disadvantages of er model in DBMS. Types of database models ..
Advantages and disadvantages of er model in DBMS. Types of database models ..
 
Er model
Er modelEr model
Er model
 
ER DIAGRAM & ER MODELING IN DBMS
ER DIAGRAM & ER MODELING IN DBMSER DIAGRAM & ER MODELING IN DBMS
ER DIAGRAM & ER MODELING IN DBMS
 
database
databasedatabase
database
 
Data model and entity relationship
Data model and entity relationshipData model and entity relationship
Data model and entity relationship
 
dbms mannual.pdf
dbms mannual.pdfdbms mannual.pdf
dbms mannual.pdf
 
Lecture one db
Lecture one dbLecture one db
Lecture one db
 
Entity Relationship Modelling
Entity Relationship ModellingEntity Relationship Modelling
Entity Relationship Modelling
 
Data Models & Introduction to UML
Data Models & Introduction to UML Data Models & Introduction to UML
Data Models & Introduction to UML
 
Er Modeling
Er ModelingEr Modeling
Er Modeling
 
DBMS Unit-2_Final.pptx
DBMS Unit-2_Final.pptxDBMS Unit-2_Final.pptx
DBMS Unit-2_Final.pptx
 
B.Sc. II (IV Sem) RDBMS & PL/SQL Unit-2 Relational Model
B.Sc. II (IV Sem) RDBMS & PL/SQL Unit-2 Relational ModelB.Sc. II (IV Sem) RDBMS & PL/SQL Unit-2 Relational Model
B.Sc. II (IV Sem) RDBMS & PL/SQL Unit-2 Relational Model
 
database.pptx
database.pptxdatabase.pptx
database.pptx
 
Unit1 rdbms study_materials
Unit1 rdbms study_materialsUnit1 rdbms study_materials
Unit1 rdbms study_materials
 
Unit1 rdbms study_materials-converted (1) (1)
Unit1 rdbms study_materials-converted (1) (1)Unit1 rdbms study_materials-converted (1) (1)
Unit1 rdbms study_materials-converted (1) (1)
 
Rdbms ER model
Rdbms ER modelRdbms ER model
Rdbms ER model
 

More from Pihu Goel

Cyber security
Cyber securityCyber security
Cyber securityPihu Goel
 
Software engineering
Software engineeringSoftware engineering
Software engineeringPihu Goel
 
Operating system
Operating system Operating system
Operating system Pihu Goel
 
Java applets
Java appletsJava applets
Java appletsPihu Goel
 
Introduction to ajax
Introduction  to  ajaxIntroduction  to  ajax
Introduction to ajaxPihu Goel
 
Computer network
Computer networkComputer network
Computer networkPihu Goel
 
Evolutionary models
Evolutionary modelsEvolutionary models
Evolutionary modelsPihu Goel
 

More from Pihu Goel (7)

Cyber security
Cyber securityCyber security
Cyber security
 
Software engineering
Software engineeringSoftware engineering
Software engineering
 
Operating system
Operating system Operating system
Operating system
 
Java applets
Java appletsJava applets
Java applets
 
Introduction to ajax
Introduction  to  ajaxIntroduction  to  ajax
Introduction to ajax
 
Computer network
Computer networkComputer network
Computer network
 
Evolutionary models
Evolutionary modelsEvolutionary models
Evolutionary models
 

Recently uploaded

Module 2_ Divide and Conquer Approach.pptx
Module 2_ Divide and Conquer Approach.pptxModule 2_ Divide and Conquer Approach.pptx
Module 2_ Divide and Conquer Approach.pptxnikshaikh786
 
Nexus - Final Day 12th February 2024.pptx
Nexus - Final Day 12th February 2024.pptxNexus - Final Day 12th February 2024.pptx
Nexus - Final Day 12th February 2024.pptxRohanAgarwal340656
 
PM24_Oral_Presentation_Template_Guidelines.pptx
PM24_Oral_Presentation_Template_Guidelines.pptxPM24_Oral_Presentation_Template_Guidelines.pptx
PM24_Oral_Presentation_Template_Guidelines.pptxnissamant
 
Microservices: Benefits, drawbacks and are they for me?
Microservices: Benefits, drawbacks and are they for me?Microservices: Benefits, drawbacks and are they for me?
Microservices: Benefits, drawbacks and are they for me?Marian Marinov
 
ExtraordinAIre Monthly Newsletter Jan 2024
ExtraordinAIre Monthly Newsletter Jan 2024ExtraordinAIre Monthly Newsletter Jan 2024
ExtraordinAIre Monthly Newsletter Jan 2024Savipriya Raghavendra
 
Center Enamel is the leading fire water tanks manufacturer in China.docx
Center Enamel is the leading fire water tanks manufacturer in China.docxCenter Enamel is the leading fire water tanks manufacturer in China.docx
Center Enamel is the leading fire water tanks manufacturer in China.docxsjzzztc
 
Center Enamel is the leading bolted steel tanks manufacturer in China.docx
Center Enamel is the leading bolted steel tanks manufacturer in China.docxCenter Enamel is the leading bolted steel tanks manufacturer in China.docx
Center Enamel is the leading bolted steel tanks manufacturer in China.docxsjzzztc
 
fat and edible oil processsing.ppt, refining
fat and edible oil processsing.ppt, refiningfat and edible oil processsing.ppt, refining
fat and edible oil processsing.ppt, refiningteddymebratie
 
Introduction to the telecom tower industry
Introduction to the telecom tower industryIntroduction to the telecom tower industry
Introduction to the telecom tower industryssuserf5bbfd
 
Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...
Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...
Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...C Sai Kiran
 
Introduction and replication to DragonflyDB
Introduction and replication to DragonflyDBIntroduction and replication to DragonflyDB
Introduction and replication to DragonflyDBMarian Marinov
 
【文凭定制】坎特伯雷大学毕业证学历认证
【文凭定制】坎特伯雷大学毕业证学历认证【文凭定制】坎特伯雷大学毕业证学历认证
【文凭定制】坎特伯雷大学毕业证学历认证muvgemo
 
Deluck Technical Works Company Profile.pdf
Deluck Technical Works Company Profile.pdfDeluck Technical Works Company Profile.pdf
Deluck Technical Works Company Profile.pdfartpoa9
 
Series of training sessions by our experts for you to provide necessary insig...
Series of training sessions by our experts for you to provide necessary insig...Series of training sessions by our experts for you to provide necessary insig...
Series of training sessions by our experts for you to provide necessary insig...AshishChanchal1
 
S. Kim, NeurIPS 2023, MLILAB, KAISTAI
S. Kim,  NeurIPS 2023,  MLILAB,  KAISTAIS. Kim,  NeurIPS 2023,  MLILAB,  KAISTAI
S. Kim, NeurIPS 2023, MLILAB, KAISTAIMLILAB
 
CDE_Sustainability Performance_20240214.pdf
CDE_Sustainability Performance_20240214.pdfCDE_Sustainability Performance_20240214.pdf
CDE_Sustainability Performance_20240214.pdf8-koi
 
CHAPTER 1_ HTML and CSS Introduction Module
CHAPTER 1_ HTML and CSS Introduction ModuleCHAPTER 1_ HTML and CSS Introduction Module
CHAPTER 1_ HTML and CSS Introduction Modulessusera4f8281
 
Introduction about Technology roadmap for Industry 4.0
Introduction about Technology roadmap for Industry 4.0Introduction about Technology roadmap for Industry 4.0
Introduction about Technology roadmap for Industry 4.0RaishKhanji
 
Chapter 1 - Drilling Fluid Functions GR.ppt
Chapter 1 - Drilling Fluid Functions GR.pptChapter 1 - Drilling Fluid Functions GR.ppt
Chapter 1 - Drilling Fluid Functions GR.pptzeidali3
 
chap. 3. lipid deterioration oil and fat processign
chap. 3. lipid deterioration oil and fat processignchap. 3. lipid deterioration oil and fat processign
chap. 3. lipid deterioration oil and fat processignteddymebratie
 

Recently uploaded (20)

Module 2_ Divide and Conquer Approach.pptx
Module 2_ Divide and Conquer Approach.pptxModule 2_ Divide and Conquer Approach.pptx
Module 2_ Divide and Conquer Approach.pptx
 
Nexus - Final Day 12th February 2024.pptx
Nexus - Final Day 12th February 2024.pptxNexus - Final Day 12th February 2024.pptx
Nexus - Final Day 12th February 2024.pptx
 
PM24_Oral_Presentation_Template_Guidelines.pptx
PM24_Oral_Presentation_Template_Guidelines.pptxPM24_Oral_Presentation_Template_Guidelines.pptx
PM24_Oral_Presentation_Template_Guidelines.pptx
 
Microservices: Benefits, drawbacks and are they for me?
Microservices: Benefits, drawbacks and are they for me?Microservices: Benefits, drawbacks and are they for me?
Microservices: Benefits, drawbacks and are they for me?
 
ExtraordinAIre Monthly Newsletter Jan 2024
ExtraordinAIre Monthly Newsletter Jan 2024ExtraordinAIre Monthly Newsletter Jan 2024
ExtraordinAIre Monthly Newsletter Jan 2024
 
Center Enamel is the leading fire water tanks manufacturer in China.docx
Center Enamel is the leading fire water tanks manufacturer in China.docxCenter Enamel is the leading fire water tanks manufacturer in China.docx
Center Enamel is the leading fire water tanks manufacturer in China.docx
 
Center Enamel is the leading bolted steel tanks manufacturer in China.docx
Center Enamel is the leading bolted steel tanks manufacturer in China.docxCenter Enamel is the leading bolted steel tanks manufacturer in China.docx
Center Enamel is the leading bolted steel tanks manufacturer in China.docx
 
fat and edible oil processsing.ppt, refining
fat and edible oil processsing.ppt, refiningfat and edible oil processsing.ppt, refining
fat and edible oil processsing.ppt, refining
 
Introduction to the telecom tower industry
Introduction to the telecom tower industryIntroduction to the telecom tower industry
Introduction to the telecom tower industry
 
Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...
Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...
Introduction to Machine Learning Unit-1 Notes for II-II Mechanical Engineerin...
 
Introduction and replication to DragonflyDB
Introduction and replication to DragonflyDBIntroduction and replication to DragonflyDB
Introduction and replication to DragonflyDB
 
【文凭定制】坎特伯雷大学毕业证学历认证
【文凭定制】坎特伯雷大学毕业证学历认证【文凭定制】坎特伯雷大学毕业证学历认证
【文凭定制】坎特伯雷大学毕业证学历认证
 
Deluck Technical Works Company Profile.pdf
Deluck Technical Works Company Profile.pdfDeluck Technical Works Company Profile.pdf
Deluck Technical Works Company Profile.pdf
 
Series of training sessions by our experts for you to provide necessary insig...
Series of training sessions by our experts for you to provide necessary insig...Series of training sessions by our experts for you to provide necessary insig...
Series of training sessions by our experts for you to provide necessary insig...
 
S. Kim, NeurIPS 2023, MLILAB, KAISTAI
S. Kim,  NeurIPS 2023,  MLILAB,  KAISTAIS. Kim,  NeurIPS 2023,  MLILAB,  KAISTAI
S. Kim, NeurIPS 2023, MLILAB, KAISTAI
 
CDE_Sustainability Performance_20240214.pdf
CDE_Sustainability Performance_20240214.pdfCDE_Sustainability Performance_20240214.pdf
CDE_Sustainability Performance_20240214.pdf
 
CHAPTER 1_ HTML and CSS Introduction Module
CHAPTER 1_ HTML and CSS Introduction ModuleCHAPTER 1_ HTML and CSS Introduction Module
CHAPTER 1_ HTML and CSS Introduction Module
 
Introduction about Technology roadmap for Industry 4.0
Introduction about Technology roadmap for Industry 4.0Introduction about Technology roadmap for Industry 4.0
Introduction about Technology roadmap for Industry 4.0
 
Chapter 1 - Drilling Fluid Functions GR.ppt
Chapter 1 - Drilling Fluid Functions GR.pptChapter 1 - Drilling Fluid Functions GR.ppt
Chapter 1 - Drilling Fluid Functions GR.ppt
 
chap. 3. lipid deterioration oil and fat processign
chap. 3. lipid deterioration oil and fat processignchap. 3. lipid deterioration oil and fat processign
chap. 3. lipid deterioration oil and fat processign
 

Er model ppt

  • 2. CONTENT DBMS About – ER model Example Components: Entity Attribute Relationship
  • 3. DBMS- A database management system (DBMS) is system software for creating and managing databases. The DBMS provides users and programmers with a systematic way to create, retrieve, update and manage data
  • 4. About–ER.MODEL Entity relationship model also called e-r model and it is a high level model. This model is used to define the data elements and relationship for a specified system. It develops a conceptual design for the database. It also develops a very simple and easy to design view of data. In ER modeling, the database structure is portrayed as a diagram called an entity-relationship diagram.
  • 7.  Entity- An entity may be any object, class, person or place.  In the ER diagram, an entity can be represented as rectangles.
  • 8. Weak Entity - An entity that depends on another entity called a weak entity. The weak entity doesn't contain any key attribute of its own. The weak entity is represented by a double rectangle.
  • 9.  Attribute- The attribute is used to describe the property of an entity. For example - id, age, contact number, name, etc. can be attributes of a student.
  • 10. KeyAttribute- The key attribute is used to represent the main characteristics of an entity. It represents a primary key.  The key attribute is represented by an oval shape with the text underlined.
  • 11. CompositeAttribute- An attribute that composed of many other attributes is known as a composite attribute.
  • 12. Multivalued Attribute- An attribute can have more than one value.  These attributes are known as a multivalued attribute. The double oval is used to represent multivalued attribute.
  • 13. DerivedAttribute- An attribute that can be derived from other attribute is known as a derived attribute. It can be represented by a dashed oval.
  • 14. Relationship- A relationship is used to describe the relation between entities.  Diamond shape is used to represent the relationship. There are two types one is strong relation and second is weak relation. Strong relationship represented by a single diamond where weak relationship represented by double diamond
  • 15. Typesofrelationship- 1.One-to-One Relationship When only one instance of an entity is associated with the relationship, then it is known as one to one relationship. For example, A female can marry to one male, and a male can marry to one female.
  • 16. 2.One-to-many relationship When only one instance of the entity on the left, and more than one instance of an entity on the right associates with the relationship then this is known as a one-to-many relationship. For example, Scientist can invent many inventions, but the invention is done by the only specific scientist.
  • 17. 3.Many-to-one relationship When more than one instance of the entity on the left, and only one instance of an entity on the right associates with the relationship then it is known as a many-to-one relationship. For example, Student enrolls for only one course, but a course can have many students.
  • 18. 4.Many-to-many relationship When more than one instance of the entity on the left, and more than one instance of an entity on the right associates with the relationship then it is known as a many- to-many relationship. For example, Employee can assign by many projects and project can have many employees.