We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byTheodore Dory
Modified over 2 years ago
1 Entity-Relationship Modeling
2 ER Graphical modeling technique Informal, understandable for laymen Coarse technique to design tables Provides rules of thumb for mapping to table structures
3 Entities and attributes
4 Relations (associations)
5 Recursive relations With roles
6 Weak entities
8 Cardinality & optionality ( 0,n) (1,1) optional mandatory
ERD -> relational schema
Solution 1 E1 (K1, A1, …, Am, K2) E2 (K2, B1, …, Bn) Solution 2 E1 (K1, A1, …, Am) E2 (K2, B1, …, Bn, K1)
ERD -> relational schema Solution 3 E1 (K1, A1, …, Am, K2) E2 (K2, B1, …, Bn, K1)
ERD -> relational schema Solution 4 E1 (K1, A1, …, Am) E2 (K2, B1, …, Bn) R (K1, K2)
BIS Database Systems School of Management, Business Information Systems, Assumption University A.Thanop Somprasong Chapter # 4 Entity Relationship.
The transformation of an ER or EER model into a relational model 1.
Entity Relationship Diagrams 1. Basic Elements and Rules.
3 Entity Relationship (E-R) Modeling. 3 2 In this lecture, you will learn: What a conceptual model is and what its purpose is The difference between internal.
Week 5 Relational Database Design by ER- -to-Relational Mapping.
Data Analysis 1 Chapter 2.1 V3.1 Napier University Dr Gordon Russell.
INFM 603 – Information Technology and Organizational Context Lecture 8 Entity Relationship Diagrams.
CSCD34- Data Management Systems. A. Vaisman1 The Entity-Relationship Model.
1 Conceptual Design using the Entity- Relationship Model.
Transform an ER Model into a Relational Database Schema.
Database Management Systems, hyunja Lee1 The Entity-Relationship Model Chapter 2.
Database Design. miniworld Requirements & collection analysis Conceptual Design Data Model Mapping Physical Design Database Requirements Conceptual Schema.
Entity/Relationship Modelling. Topics To Be Covered In This Lecture Entity/Relationship models Entities and Attributes Relationships Attributes E/R Diagrams.
Chapter 2: Entity-Relationship Model Entity Sets Relationship Sets Design Issues Mapping Constraints Keys E-R Diagram Extended E-R Features Design of an.
Entity Relationship (ER) Modeling The ER Model Developing and ER Diagram Extended ER Model Entity Integrity : Selecting Primary Key Chapter 4.
Case Study Banking Business Scenario. Assumptions : There are multiple banks and each bank has many branches. Each branch has multiple customers Customers.
Information System Analysis Lab 7. ERD entity-relationship diagram is a data modeling technique that creates a graphical representation of the entities,
ICS 434 Advanced Database Systems Dr. Abdallah Al-Sukairi Second Semester (032) King Fahd University of Petroleum & Minerals.
This part is about how XML Documents can be stored and retrieved.
Database Design J.G. Zheng June 29 th 2005 DB Chapter 5.
Conceptual / semantic modelling 1. 2 Overview design; conceptual design; ER model concepts; semantic aspects; problems; Enhanced ER (EER) modelling; transforming.
Bayu Adhi Tama, ST., MTI. Database Modeling: Methods, Techniques, and Symbols Adapted from Elmasri and Poniah with necessary modification.
©Silberschatz, Korth and Sudarshan2.1Database System Concepts Chapter 2: Entity-Relationship Model Entity Sets Relationship Sets Design Issues Mapping.
1 SA0951a Entity-Relationship Modelling. 2 What is it about? ER model is used to show the Conceptual schema of an organisation. Independent of specific.
ITS232 Introduction To Database Management Systems Siti Nurbaya Ismail Faculty of Computer Science & Mathematics, Universiti Teknologi MARA (UiTM), Kedah.
Native XML Database or RDBMS. Data or Document orientation If you are primarily storing documents, then a Native XML Database may be the best option.
Database System Concepts, 5th Ed. ©Silberschatz, Korth and Sudarshan See for conditions on re-usewww.db-book.com Chapter 6: Entity-Relationship.
Issues of concern at COREP ON 15. September 2004 The common framework should: be flexible enough so that countries are able to choose the level of details.
Case Study ER Model For a college DB. Assumptions : A college contains many departments Each department can offer any number of courses Many instructors.
Three-Step Database Design. Database applications are modeled using a three-step design process Conceptual-datatypes, relationships and constraints(ER.
© 2016 SlidePlayer.com Inc. All rights reserved.