SlideShare ist ein Scribd-Unternehmen logo
1 von 23
Relational Database Lecture 2: Entity-Relationship Modelling
Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object]
Recap ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Entity-Relationship Modelling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Entities and Entity-types ,[object Object],[object Object],[object Object],Lecture This lecture Lecturer Me Student You Entity-type Entity
E-R Diagram  ,[object Object],Student Lecture Lecturer
Relationships and Relationship-types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
E-R Diagram ,[object Object],Student Lecture Lecturer E-R depiction of entity-types and their relationship-types gives attends
Relationship-type Degree ,[object Object],[object Object],[object Object],[object Object]
E-R Diagram ,[object Object],Student Lecture Lecturer E-R diagram extended to show relationship degrees. gives attends M 1 M N
Participation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
E-R Diagram ,[object Object],Student Lecture Lecturer E-R diagram extended to show relationship degrees. gives attends M 1 M N
Attributes ,[object Object],[object Object],Lecture time date length place
Dealing with multi-valued attributes ,[object Object],Lecture time date length Lecture theatre Takes place in M N
E-R Diagram Student Lecture Lecturer E-R Diagram for student-lecture-lecturer attends gives M N 1 M surname forenames title surname forenames title time date length place Reg_no
Attribute or Entity-type? ,[object Object],[object Object],[object Object]
Promotion from attribute to entity-type I Lecture time date module length
Promotion from attribute to entity-type I Lecture time date length Belongs to Module code title credits M 1
Promotion from attribute to entity-type I Lecture time date objectives length
Promotion from attribute to entity-type I Lecture time date length Addresses Objectives description M N
Determining components of an E-R Diagram ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Example UoD ,[object Object]
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]

Weitere ähnliche Inhalte

Was ist angesagt?

Was ist angesagt? (20)

Er diagrams presentation
Er diagrams presentationEr diagrams presentation
Er diagrams presentation
 
2. Entity Relationship Model in DBMS
2. Entity Relationship Model in DBMS2. Entity Relationship Model in DBMS
2. Entity Relationship Model in DBMS
 
Database Relationships
Database RelationshipsDatabase Relationships
Database Relationships
 
Files Vs DataBase
Files Vs DataBaseFiles Vs DataBase
Files Vs DataBase
 
Relational database
Relational database Relational database
Relational database
 
Dbms architecture
Dbms architectureDbms architecture
Dbms architecture
 
Entity Relationship Diagrams
Entity Relationship DiagramsEntity Relationship Diagrams
Entity Relationship Diagrams
 
Relational model
Relational modelRelational model
Relational model
 
Decomposition using Functional Dependency
Decomposition using Functional DependencyDecomposition using Functional Dependency
Decomposition using Functional Dependency
 
Dbms relational model
Dbms relational modelDbms relational model
Dbms relational model
 
Introduction to databases
Introduction to databasesIntroduction to databases
Introduction to databases
 
Entities and attributes
Entities and attributesEntities and attributes
Entities and attributes
 
DBMS Keys
DBMS KeysDBMS Keys
DBMS Keys
 
Data model and entity relationship
Data model and entity relationshipData model and entity relationship
Data model and entity relationship
 
Unit05 dbms
Unit05 dbmsUnit05 dbms
Unit05 dbms
 
Degree of relationship set
Degree of relationship setDegree of relationship set
Degree of relationship set
 
Databases: Normalisation
Databases: NormalisationDatabases: Normalisation
Databases: Normalisation
 
Er model ppt
Er model pptEr model ppt
Er model ppt
 
Ordbms
OrdbmsOrdbms
Ordbms
 
Basic DBMS ppt
Basic DBMS pptBasic DBMS ppt
Basic DBMS ppt
 

Ähnlich wie Entity relationship modelling

Ähnlich wie Entity relationship modelling (20)

Data base lec3 (erd)
Data base lec3 (erd)Data base lec3 (erd)
Data base lec3 (erd)
 
dbms mannual.pdf
dbms mannual.pdfdbms mannual.pdf
dbms mannual.pdf
 
Er Modeling
Er ModelingEr Modeling
Er Modeling
 
Er diagrams
Er diagramsEr diagrams
Er diagrams
 
5e7ry754.pptx
5e7ry754.pptx5e7ry754.pptx
5e7ry754.pptx
 
Entity Relationship Modelling
Entity Relationship ModellingEntity Relationship Modelling
Entity Relationship Modelling
 
Data Modeling Er
Data Modeling ErData Modeling Er
Data Modeling Er
 
Er model
Er modelEr model
Er model
 
Database part3-
Database part3-Database part3-
Database part3-
 
E_R-Diagram (2).pptx
E_R-Diagram (2).pptxE_R-Diagram (2).pptx
E_R-Diagram (2).pptx
 
ER Diagram- Cardinality.pptx
ER Diagram- Cardinality.pptxER Diagram- Cardinality.pptx
ER Diagram- Cardinality.pptx
 
Entity Relationship Diagram part9
Entity Relationship Diagram part9Entity Relationship Diagram part9
Entity Relationship Diagram part9
 
Design issues with constraints of E-R model
Design issues with constraints of E-R modelDesign issues with constraints of E-R model
Design issues with constraints of E-R model
 
Entity Relationship Model
Entity Relationship ModelEntity Relationship Model
Entity Relationship Model
 
Data modeling
Data modelingData modeling
Data modeling
 
Introduction of Database Design and Development
Introduction of Database Design and DevelopmentIntroduction of Database Design and Development
Introduction of Database Design and Development
 
Introduction to ER Diagrams
Introduction to ER DiagramsIntroduction to ER Diagrams
Introduction to ER Diagrams
 
DBMS Unit-2_Final.pptx
DBMS Unit-2_Final.pptxDBMS Unit-2_Final.pptx
DBMS Unit-2_Final.pptx
 
Entity Relationship Diagram – ER Diagram in DBMS.pptx
Entity Relationship Diagram – ER Diagram in DBMS.pptxEntity Relationship Diagram – ER Diagram in DBMS.pptx
Entity Relationship Diagram – ER Diagram in DBMS.pptx
 
ECEG 4702-Class7-Entity-Relationship modeling.pptx
ECEG 4702-Class7-Entity-Relationship modeling.pptxECEG 4702-Class7-Entity-Relationship modeling.pptx
ECEG 4702-Class7-Entity-Relationship modeling.pptx
 

Mehr von Dr. C.V. Suresh Babu (20)

Data analytics with R
Data analytics with RData analytics with R
Data analytics with R
 
Association rules
Association rulesAssociation rules
Association rules
 
Clustering
ClusteringClustering
Clustering
 
Classification
ClassificationClassification
Classification
 
Blue property assumptions.
Blue property assumptions.Blue property assumptions.
Blue property assumptions.
 
Introduction to regression
Introduction to regressionIntroduction to regression
Introduction to regression
 
DART
DARTDART
DART
 
Mycin
MycinMycin
Mycin
 
Expert systems
Expert systemsExpert systems
Expert systems
 
Dempster shafer theory
Dempster shafer theoryDempster shafer theory
Dempster shafer theory
 
Bayes network
Bayes networkBayes network
Bayes network
 
Bayes' theorem
Bayes' theoremBayes' theorem
Bayes' theorem
 
Knowledge based agents
Knowledge based agentsKnowledge based agents
Knowledge based agents
 
Rule based system
Rule based systemRule based system
Rule based system
 
Formal Logic in AI
Formal Logic in AIFormal Logic in AI
Formal Logic in AI
 
Production based system
Production based systemProduction based system
Production based system
 
Game playing in AI
Game playing in AIGame playing in AI
Game playing in AI
 
Diagnosis test of diabetics and hypertension by AI
Diagnosis test of diabetics and hypertension by AIDiagnosis test of diabetics and hypertension by AI
Diagnosis test of diabetics and hypertension by AI
 
A study on “impact of artificial intelligence in covid19 diagnosis”
A study on “impact of artificial intelligence in covid19 diagnosis”A study on “impact of artificial intelligence in covid19 diagnosis”
A study on “impact of artificial intelligence in covid19 diagnosis”
 
A study on “impact of artificial intelligence in covid19 diagnosis”
A study on “impact of artificial intelligence in covid19 diagnosis”A study on “impact of artificial intelligence in covid19 diagnosis”
A study on “impact of artificial intelligence in covid19 diagnosis”
 

Kürzlich hochgeladen

Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxDr. Asif Anas
 
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptxPISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptxEduSkills OECD
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...raviapr7
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17Celine George
 
CAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptxCAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptxSaurabhParmar42
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice documentXsasf Sfdfasd
 
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxAUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxiammrhaywood
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxKatherine Villaluna
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxKatherine Villaluna
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapitolTechU
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxDr. Santhosh Kumar. N
 
The Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George WellsThe Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George WellsEugene Lysak
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and stepobaje godwin sunday
 
HED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfHED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfMohonDas
 
How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17Celine George
 
What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?TechSoup
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17Celine George
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRATanmoy Mishra
 

Kürzlich hochgeladen (20)

Ultra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptxUltra structure and life cycle of Plasmodium.pptx
Ultra structure and life cycle of Plasmodium.pptx
 
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptxPISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
PISA-VET launch_El Iza Mohamedou_19 March 2024.pptx
 
Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...Patient Counselling. Definition of patient counseling; steps involved in pati...
Patient Counselling. Definition of patient counseling; steps involved in pati...
 
How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17How to Show Error_Warning Messages in Odoo 17
How to Show Error_Warning Messages in Odoo 17
 
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdfPersonal Resilience in Project Management 2 - TV Edit 1a.pdf
Personal Resilience in Project Management 2 - TV Edit 1a.pdf
 
CAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptxCAULIFLOWER BREEDING 1 Parmar pptx
CAULIFLOWER BREEDING 1 Parmar pptx
 
The Singapore Teaching Practice document
The Singapore Teaching Practice documentThe Singapore Teaching Practice document
The Singapore Teaching Practice document
 
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptxAUDIENCE THEORY -- FANDOM -- JENKINS.pptx
AUDIENCE THEORY -- FANDOM -- JENKINS.pptx
 
UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024UKCGE Parental Leave Discussion March 2024
UKCGE Parental Leave Discussion March 2024
 
Practical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptxPractical Research 1 Lesson 9 Scope and delimitation.pptx
Practical Research 1 Lesson 9 Scope and delimitation.pptx
 
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptxPractical Research 1: Lesson 8 Writing the Thesis Statement.pptx
Practical Research 1: Lesson 8 Writing the Thesis Statement.pptx
 
CapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptxCapTechU Doctoral Presentation -March 2024 slides.pptx
CapTechU Doctoral Presentation -March 2024 slides.pptx
 
M-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptxM-2- General Reactions of amino acids.pptx
M-2- General Reactions of amino acids.pptx
 
The Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George WellsThe Stolen Bacillus by Herbert George Wells
The Stolen Bacillus by Herbert George Wells
 
General views of Histopathology and step
General views of Histopathology and stepGeneral views of Histopathology and step
General views of Histopathology and step
 
HED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdfHED Office Sohayok Exam Question Solution 2023.pdf
HED Office Sohayok Exam Question Solution 2023.pdf
 
How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17How to Add a New Field in Existing Kanban View in Odoo 17
How to Add a New Field in Existing Kanban View in Odoo 17
 
What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?What is the Future of QuickBooks DeskTop?
What is the Future of QuickBooks DeskTop?
 
How to Solve Singleton Error in the Odoo 17
How to Solve Singleton Error in the  Odoo 17How to Solve Singleton Error in the  Odoo 17
How to Solve Singleton Error in the Odoo 17
 
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRADUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
DUST OF SNOW_BY ROBERT FROST_EDITED BY_ TANMOY MISHRA
 

Entity relationship modelling