Database Technology. Topic 4: Enhanced Entity- Relationship (EER) Modeling
|
|
- Lucas Wells
- 5 years ago
- Views:
Transcription
1 Topic 4: Enhanced Entity- Relationship (EER) Modeling Olaf Hartig
2 Example A taxi company needs to model their activities. There are two types of employees in the company: drivers and operators. For drivers it is interesting to know the date of issue and type of the driving license, and the date of issue of the taxi driver s certificate. For all employees it is interesting to know their personal number, address and the available phone numbers. The company owns a number of cars. For each car there is a need to know its type, year of manufacturing, number of places in the car and date of the last service. The company wants to have a record of car trips. A taxi may be picked on a street or ordered through an operator who assigns the order to a certain driver and a car. Departure and destination addresses together with times should also be recorded. 2
3 Recall: DB Design Process 3
4 Entity-Relationship (ER) Model High-level conceptual data model An overview of the database Easy to discuss with non-database experts Easy to translate to data model of DBMS ER diagram Diagrammatic notation associated with the ER model 4
5 Entities and Entity Types Entity: a thing in the real world with an independent existence Attributes: Properties that describe an entity Entity type: A collection of entities that have the same set of attributes SS ame Regumber Model Year Owner Car 5
6 Attributes simple versus composite single-valued versus multivalued stored versus derived Street City SS ame Address Owner Phoneumber Age 6
7 Constraints on Attributes Value sets (domains) of attributes Key attributes Street City SS ame Address Owner Phoneumber Age 7
8 Relationship Types Relationship type: Association among entity types Model SS ame Regumber Year Owner 1 owns Car 8
9 Constraints on Relationship Types Cardinality ratio: Maximum number of relationships an entity can participate in Possible cardinality ratio: 1:1, 1:, :1, and :M Owner 1 owns Car Owner 1 owns Car Owner owns M Car 9
10 Constraints on Relationship Types Participation constraint Total participation: Every entity participates in at least one relationship with another entity SS Every car must be owned by at least one owner. M Owner owns Car Regumber 10
11 Attributes of Relationship Types Store information on who owned which car and during which period of time SS ame Owner SellDate BuyDate owns Regumber M Car Model Year 11
12 n-ary Relationships Example: A person works as an engineer at one company and as a gym instructor at another company Company works at M Employee works as M JobType Employee M works as K Company JobType Ternary 12
13 Weak Entity Types Identified by their relationship to a specific entity from another entity type Do not have key attributes of their own Only partial key The identifying entity has the rest of the key name name Team 1 plays_in Player number 13
14 ER otation 14
15 Enhanced Entity-Relationship (EER) Model
16 Enhanced ER (EER) Model Why more? To support more complex data requirements Example: Only some employees can use a company car, only managers have to write a monthly report, but all employees have assigned personal number, salary account and a place in the office. What more? Specialization / generalization Subtype / supertype Union subtypes Attribute and relationship inheritance 16
17 Subtype / Supertype Surname P ame Firstame specialization generalization Employee process of defining types Commission U d U U o Salesman Engineer Manager ProjectLeader 1 1 uses writes 1 Car MonthlyReport Regumber ReportID 17
18 Constraints on Subtypes Disjointness constraint Specifies that the subclasses of the specialization must be disjoint Otherwise overlapping Completeness constraint (or totalness constraint) Specifies that every superclass entity must be in a subclass Otherwise partial Disjointness and completeness are independent constraints i.e., four cases are possible disjoint and total disjoint and partial overlapping and total overlapping and partial 18
19 Example
20 Example A taxi company needs to model their activities. There are two types of employees in the company: drivers and operators. For drivers it is interesting to know the date of issue and type of the driving license, and the date of issue of the taxi driver s certificate. For all employees it is interesting to know their personal number, address and the available phone numbers. The company owns a number of cars. For each car there is a need to know its type, year of manufacturing, number of places in the car and date of the last service. The company wants to have a record of car trips. A taxi may be picked on a street or ordered through an operator who assigns the order to a certain driver and a car. Departure and destination addresses together with times should also be recorded. 22
21 Example Street Postumber Address Town P Employee Phone TaxiCertifDate Uo U DrivingLicenseDate Driver Operator DrivingLicenseType 1 1 drives assign DeparturePlace Destination DepTime DestTime ID Trip made_by Type Regumber 1 Car YearOfManuf ServiceDate Places 23
22 Example (cont'd) A driver may have many driving licenses (types) TaxiCertifDate DrivingLicenseDate DrivingLicenseType Driver Date Type Id TaxiCertifDate DrivingLicense Körkort belongsto 1 Driver TaxiCertifDate Type DrivingLicense belongsto M Driver Date 24
23 Summary
24 Summary Entity-relationship (ER) model: a graphical way to model the world Main concepts: Entity type Relationship type Attributes Different types of constraints Enhanced ER model 26
Topic 5: Mapping of EER Diagrams to Relations
Topic 5: Mapping of EER Diagrams to Relations Olaf Hartig olaf.hartig@liu.se Recall: DB Design Process 2 Running Example 3 Algorithm for Mapping from the ER Model to the Relational Model Step 1: Map Regular
More informationChapter 9: Relational DB Design byer/eer to Relational Mapping Relational Database Design Using ER-to- Relational Mapping Mapping EER Model
Chapter 9: Relational DB Design byer/eer to Relational Mapping Relational Database Design Using ER-to- Relational Mapping Mapping EER Model Constructs to Relations Relational Database Design by ER- and
More informationRelational DB Design by ER- and EER-to-Relational Mapping Design & Analysis of Database Systems
Relational DB Design by ER- and EER-to-Relational Mapping 406.426 Design & Analysis of Database Systems Jonghun Park jonghun@snu.ac.kr Dept. of Industrial Engineering Seoul National University outline
More informationCOIS Databases
Faculty of Computing and Information Technology in Rabigh COIS 342 - Databases Chapter 4 Enhanced Entity-Relationship and UML Modeling Adapted from Elmasri & Navathe by Dr Samir BOUCETTA First Semester
More informationChapter 4. Enhanced Entity- Relationship Modeling. Enhanced-ER (EER) Model Concepts. Subclasses and Superclasses (1)
Chapter 4 Enhanced Entity- Relationship Modeling Enhanced-ER (EER) Model Concepts Includes all modeling concepts of basic ER Additional concepts: subclasses/superclasses, specialization/generalization,
More informationTHE ENTITY- RELATIONSHIP (ER) MODEL CHAPTER 7 (6/E) CHAPTER 3 (5/E)
THE ENTITY- RELATIONSHIP (ER) MODEL CHAPTER 7 (6/E) CHAPTER 3 (5/E) 2 CHAPTER 7 OUTLINE Using High-Level, Conceptual Data Models for Database Design Entity-Relationship (ER) model Popular high-level conceptual
More informationChapter 7 Relational Database Design by ER- and EERR-to-Relational Mapping
Chapter 7 Relational Database Design by ER- and EERR-to-Relational Mapping Copyright 2004 Pearson Education, Inc. Chapter Outline ER-to-Relational Mapping Algorithm Step 1: Mapping of Regular Entity Types
More informationUsing High-Level Conceptual Data Models for Database Design A Sample Database Application Entity Types, Entity Sets, Attributes, and Keys
Chapter 7: Data Modeling Using the Entity- Relationship (ER) Model Using High-Level Conceptual Data Models for Database Design A Sample Database Application Entity Types, Entity Sets, Attributes, and Keys
More informationOutline. Note 1. CSIE30600 Database Systems ER/EER to Relational Mapping 2
Outline ER-to-Relational Mapping Algorithm Step 1: Mapping of Regular Entity Types Step 2: Mapping of Weak Entity Types Step 3: Mapping of Binary 1:1 Relation Types Step 4: Mapping of Binary 1:N Relationship
More informationLELCTURE 4: ENHANCED ENTITY-RELATIONSHIP MODELING (EER)
LELCTURE 4: ENHANCED ENTITY-RELATIONSHIP MODELING (EER) Ref. Chapter12 from Database Systems: A Practical Approach to Design, Implementation and Management. Thomas Connolly, Carolyn Begg. IS220 : D at
More informationCopyright 2016 Ramez Elmasri and Shamkant B. Navathe
CHAPTER 4 Enhanced Entity-Relationship (EER) Modeling Slide 1-2 Chapter Outline EER stands for Enhanced ER or Extended ER EER Model Concepts Includes all modeling concepts of basic ER Additional concepts:
More informationEntity Relationship Data Model. Slides by: Shree Jaswal
Entity Relationship Data Model Slides by: Shree Jaswal Topics: Conceptual Modeling of a database, The Entity-Relationship (ER) Model, Entity Types, Entity Sets, Attributes, and Keys, Relationship Types,
More informationChapter (4) Enhanced Entity-Relationship and Object Modeling
Chapter (4) Enhanced Entity-Relationship and Object Modeling Objectives Concepts of subclass and superclass and the related concepts of specialization and generalization. Concept of category, which is
More informationDatabase Management
204320 - Database Management Chapter 9 Relational Database Design by ER and EERto-Relational Mapping Adapted for 204320 by Areerat Trongratsameethong Copyright 2011 Pearson Education, Inc. Publishing as
More informationDATABASE DESIGN I - 1DL300
DATABASE DESIGN I - 1DL300 Fall 2009 An introductury course on database systems http://user.it.uu.se/~udbl/dbt1-ht2009/ alt. http://www.it.uu.se/edu/course/homepage/dbastekn/ht09/ Kjell Orsborn Uppsala
More information1/24/2012. Chapter 7 Outline. Chapter 7 Outline (cont d.) CS 440: Database Management Systems
CS 440: Database Management Systems Chapter 7 Outline Using High-Level Conceptual Data Models for Database Design A Sample Database Application Entity Types, Entity Sets, Attributes, and Keys Relationship
More informationEntity-Relationship Model
Entity-Relationship Model Data Models High-level or conceptual data models provide concepts that are close to the way many users perceive data, whereas low-level or physical data models provide concepts
More informationCh 9: Mapping EER to Relational. Follow a seven-step algorithm to convert the basic ER model constructs into relations steps 1-7
Ch 9: Mapping EER to Relational Follow a seven-step algorithm to convert the basic ER model constructs into relations steps 1-7 Additional steps for EER model for specialization/generalization steps 8a
More informationCopyright 2007 Ramez Elmasri and Shamkant B. Navathe Slide 4-1
Copyright 2007 Ramez Elmasri and Shamkant B. Navathe Slide 4-1 Chapter 4 Enhanced Entity-Relationship (EER) Modeling Copyright 2007 Ramez Elmasri and Shamkant B. Navathe Chapter Outline EER stands for
More informationER to Relational Mapping
ER to Relational Mapping 1 / 19 ER to Relational Mapping Step 1: Strong Entities Step 2: Weak Entities Step 3: Binary 1:1 Relationships Step 4: Binary 1:N Relationships Step 5: Binary M:N Relationships
More informationCMP-3440 Database Systems
CMP-3440 Database Systems Database Architecture Lecture 02 zain 1 Database Design Process Application 1 Conceptual requirements Application 1 External Model Application 2 Application 3 Application 4 External
More informationDATABASE DESIGN I - 1DL300
DATABASE DESIGN I - 1DL300 Fall 2010 An introductory course on database systems http://www.it.uu.se/edu/course/homepage/dbastekn/ht10/ Manivasakan Sabesan Uppsala Database Laboratory Department of Information
More informationEnhanced Entity-Relationship (EER) Modeling
CHAPTER 4 Enhanced Entity-Relationship (EER) Modeling Copyright 2017 Ramez Elmasri and Shamkant B. Navathe Slide 1-2 Chapter Outline EER stands for Enhanced ER or Extended ER EER Model Concepts Includes
More informationDATABASDESIGN FÖR INGENJÖRER F
1 DATABASDESIGN FÖR INGENJÖRER - 1056F Sommar 2005 En introduktionskurs i databassystem http://user.it.uu.se/~udbl/dbt-sommar05/ alt. http://www.it.uu.se/edu/course/homepage/dbdesign/st05/ Kjell Orsborn
More informationDATA MODELING USING THE ENTITY-RELATIONSHIP MODEL. 1 Powered by POeT Solvers Limited
DATA MODELING USING THE ENTITY-RELATIONSHIP MODEL 1 www.pmtutor.org Powered by POeT Solvers Limited 2 www.pmtutor.org Powered by POeT Solvers Limited Entity-Relationship (ER) Model The ER model is a high-level
More informationChapter 2: Entity-Relationship Model
Chapter 2: Entity-Relationship Model! Entity Sets! Relationship Sets! Design Issues! Mapping Constraints! Keys! E-R Diagram! Extended E-R Features! Design of an E-R Database Schema! Reduction of an E-R
More informationEnhanced Entity- Relationship Models (EER)
Enhanced Entity- Relationship Models (EER) LECTURE 3 Dr. Philipp Leitner philipp.leitner@chalmers.se @xleitix LECTURE 3 Covers Small part of Chapter 3 Chapter 4 Please read this up until next lecture!
More informationMIDTERM EXAMINATION Spring 2010 CS403- Database Management Systems (Session - 4) Ref No: Time: 60 min Marks: 38
Student Info StudentID: Center: ExamDate: MIDTERM EXAMINATION Spring 2010 CS403- Database Management Systems (Session - 4) Ref No: 1356458 Time: 60 min Marks: 38 BC080402322 OPKST 5/28/2010 12:00:00 AM
More informationDATABASTEKNIK - 1DL116
1 DATABASTEKNIK - 1DL116 Fall 2003 An introductury course on database systems http://user.it.uu.se/~udbl/dbt-ht2003/ Kjell Orsborn Uppsala Database Laboratory Department of Information Technology, Uppsala
More informationCS 338 The Enhanced Entity-Relationship (EER) Model
CS 338 The Enhanced Entity-Relationship (EER) Model Bojana Bislimovska Spring 2017 Major research Outline EER model overview Subclasses, superclasses and inheritance Specialization and generalization Modeling
More informationIntroduction to Data Management. Lecture #3 (Conceptual DB Design) Instructor: Chen Li
Introduction to Data Management Lecture #3 (Conceptual DB Design) Instructor: Chen Li 1 Announcements v HW #1 is now available v Today s plan Conceptual DB design, cont. Advanced ER concepts 2 Weak Entities
More informationConceptual Data Modeling and the Entity- Relationship Model. Department of Computer Science Northern Illinois University September 2014
Conceptual Data Modeling and the Entity- Relationship Model Department of Computer Science Northern Illinois University September 2014 Data Models A means of describing the structure of the data A set
More informationConceptual Data Models for Database Design
Conceptual Data Models for Database Design Entity Relationship (ER) Model The most popular high-level conceptual data model is the ER model. It is frequently used for the conceptual design of database
More information0. Database Systems 1.1 Introduction to DBMS Information is one of the most valuable resources in this information age! How do we effectively and efficiently manage this information? - How does Wal-Mart
More informationData Modeling Using the Entity-Relationship (ER) Model
CHAPTER 3 Data Modeling Using the Entity-Relationship (ER) Model Copyright 2017 Ramez Elmasri and Shamkant B. Navathe Slide 1-1 Chapter Outline Overview of Database Design Process Example Database Application
More informationNon-overlappingoverlapping. Final outcome of the worked example On pages R&C pages R&C page 157 Fig 3.52
Objectives Computer Science 202 Database Systems: Entity Relation Modelling To learn what a conceptual model is and what its purpose is. To learn the difference between internal models and external models.
More informationAdvance Database Management System
Advance Database Management System Conceptual Design Lecture- A simplified database design process Database Requirements UoD Requirements Collection and Analysis Functional Requirements A simplified database
More informationTHE ENHANCED ER (EER) MODEL CHAPTER 8 (6/E) CHAPTER 4 (5/E)
THE ENHANCED ER (EER) MODEL CHAPTER 8 (6/E) CHAPTER 4 (5/E) 2 CHAPTER 8 OUTLINE Extending the ER model Created to design more accurate database schemas Reflect the data properties and constraints more
More informationMIT Database Management Systems Lesson 03: Entity Relationship Diagrams
MIT 22033 Database Management Systems Lesson 03: Entity Relationship Diagrams By S. Sabraz Nawaz Senior Lecturer in MIT, FMC, SEUSL & A.J.M.Hasmy FMC, SEUSL ER - Model The entity-relationship (ER) data
More informationOverview of Database Design Process Example Database Application (COMPANY) ER Model Concepts
Chapter Outline Overview of Database Design Process Example Database Application (COMPANY) ER Model Concepts Entities and Attributes Entity Types, Value Sets, and Key Attributes Relationships and Relationship
More informationChapter 8 The Enhanced Entity- Relationship (EER) Model
Chapter 8 The Enhanced Entity- Relationship (EER) Model Copyright 2011 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Chapter 8 Outline Subclasses, Superclasses, and Inheritance Specialization
More informationChapter 6: Entity-Relationship Model. The Next Step: Designing DB Schema. Identifying Entities and their Attributes. The E-R Model.
Chapter 6: Entity-Relationship Model The Next Step: Designing DB Schema Our Story So Far: Relational Tables Databases are structured collections of organized data The Relational model is the most common
More informationMIS Database Systems Entity-Relationship Model.
MIS 335 - Database Systems Entity-Relationship Model http://www.mis.boun.edu.tr/durahim/ Ahmet Onur Durahim Learning Objectives Database Design Main concepts in the ER model? ER Diagrams Database Design
More informationThe Next Step: Designing DB Schema. Chapter 6: Entity-Relationship Model. The E-R Model. Identifying Entities and their Attributes.
Chapter 6: Entity-Relationship Model Our Story So Far: Relational Tables Databases are structured collections of organized data The Relational model is the most common data organization model The Relational
More informationHigh Level Database Models
ICS 321 Fall 2011 High Level Database Models Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa 9/21/2011 Lipyeow Lim -- University of Hawaii at Manoa 1 Database
More informationThe Entity-Relationship Model. The Entity-Relationship model. The ER model. The Entity-Relationship model. E-R Model Constructs. E-R Model Constructs
The Entity-Relationship Model Conceptual Data Modeling The Entity-Relationship model The E-R model is a detailed, logical representation of the data for an organisation or business area It should be understandable
More informationData Modeling with the Entity Relationship Model. CS157A Chris Pollett Sept. 7, 2005.
Data Modeling with the Entity Relationship Model CS157A Chris Pollett Sept. 7, 2005. Outline Conceptual Data Models and Database Design An Example Application Entity Types, Sets, Attributes and Keys Relationship
More informationChapter Outline. Note 1. Overview of Database Design Process Example Database Application (COMPANY) ER Model Concepts
Chapter Outline Overview of Database Design Process Example Database Application (COMPANY) ER Model Concepts Entities and Attributes Entity Types, Value Sets, and Key Attributes Relationships and Relationship
More informationER-to-Relational Mapping
Lecture 9 1 1. Context 2. The Algorithm Outline 2 Database Design and Implementation Process 3 Data Models 4 Example ERD 5 Resulting Relational Schema 6 Step 1: Regular Entity Types i. For each regular/strong
More informationTranslation ER/EER to relational
Database technology Lecture 4: Mapping of EER model to relations Jose M. Peña jose.m.pena@liu.se Translation ER/EER to relational Migrate from mini world model to a model understandable by a DBMS. 1 EER
More informationChapter 9 Outline. Relational Database Design by ER and EERto-Relational. Mapping Fundamentals of Database Systems
204222 - Fundamentals of Database Systems Chapter 9 Relational Database Design by ER and EERto-Relational Mapping Chapter 9 Outline Relational Database Design Using ER-to- Relational Mapping Relational
More informationA database can be modeled as: + a collection of entities, + a set of relationships among entities.
The Relational Model Lecture 2 The Entity-Relationship Model and its Translation to the Relational Model Entity-Relationship (ER) Model + Entity Sets + Relationship Sets + Database Design Issues + Mapping
More informationUnit 2 - Data Modeling. Pratian Technologies (India) Pvt. Ltd.
Unit 2 - Data Modeling Pratian Technologies (India) Pvt. Ltd. Topics Information Engineering Approaches to IS Developments SDLC Prototyping ER Modeling Why Data Modeling? Definition Information Engineering
More informationConceptual Database Design (ER modeling) Chapter Three
Conceptual Database Design (ER modeling) Chapter Three 1 Agenda (Chapter Three) Overview-database design Conceptual Design (E-R Modeling) Structural Constraints EER- Generalization and Specialization Reducing
More informationChapter 8: Enhanced ER Model
Chapter 8: Enhanced ER Model Subclasses, Superclasses, and Inheritance Specialization and Generalization Constraints and Characteristics of Specialization and Generalization Hierarchies Modeling of UNION
More informationIntro to DB CHAPTER 6
Intro to DB CHAPTER 6 DATABASE DESIGN &THEER E-R MODEL Chapter 6. Entity Relationship Model Design Process Modeling Constraints E-R Diagram Design Issues Weak Entity Sets Extended E-R Features Design of
More informationChapter 2: Entity-Relationship Model. Entity Sets. Entity Sets customer and loan. Attributes. Relationship Sets. A database can be modeled as:
Chapter 2: Entity-Relationship Model Entity Sets Entity Sets Relationship Sets Design Issues Mapping Constraints Keys E-R Diagram Extended E-R Features Design of an E-R Database Schema Reduction of an
More informationOverview of db design Requirement analysis Data to be stored Applications to be built Operations (most frequent) subject to performance requirement
ITCS 3160 Data Base Design and Implementation Jing Yang 2010 Fall Class 12: Data Modeling Using the Entity-Relationship (ER) Model Overview of db design Requirement analysis Data to be stored Applications
More informationMultiple Choice Questions
Chapter 9 Structuring System Data Requirements 193 Chapter 9 Structuring System Data Requirements Multiple Choice Questions 1. Some systems developers believe that a data model is the most important part
More informationCopyright 2016 Ramez Elmasr and Shamkant B. Navathei
CHAPTER 3 Data Modeling Using the Entity-Relationship (ER) Model Slide 1-2 Chapter Outline Overview of Database Design Process Example Database Application (COMPANY) ER Model Concepts Entities and Attributes
More informationCS3200 Database Design Spring 2018 Derbinsky. Entity-Relationship (ER) Diagrams. Lecture 7
Lecture 7 . Context Outline Design & Implementation Process 2. Goals of Conceptual Design 3. Entity-Relationship (ER) Model 4. One ER Diagrammatic otation 5. Requirements Elicitation 6. Approaches to Conceptual
More informationDatabase Principles: Fundamentals of Design, Implementation, and Management Tenth Edition. Chapter 7 Data Modeling with Entity Relationship Diagrams
Database Principles: Fundamentals of Design, Implementation, and Management Tenth Edition Chapter 7 Data Modeling with Entity Relationship Diagrams Objectives In this chapter, students will learn: The
More informationOverview of Database Design Process. Data Modeling Using the Entity- Relationship (ER) Model. Two main activities:
1 / 14 Overview of Database Design Process Example Database Application (COMPANY) ER Model Concepts Entities and Attributes Entity Types, Value Sets, and Key Attributes Relationships and Relationship Types
More informationChapter 6: Entity-Relationship Model
Chapter 6: Entity-Relationship Model Database System Concepts, 5th Ed. See www.db-book.com for conditions on re-use Chapter 6: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram
More informationModule 2 : Entity-Relationship Model 15
Module 2 : Entity-Relationship Model 15 Module-02 Entity Relationship Data Model 2.1 Motivation Data modeling is an essential step in the process of creating any Database Application. It helps Database
More informationCopyright 2016 Ramez Elmasri and Shamkant B. Navathe
Chapter 12 Outline Overview of Object Database Concepts Object-Relational Features Object Database Extensions to SQL ODMG Object Model and the Object Definition Language ODL Object Database Conceptual
More informationChapter 2 ENTITY RELATIONSHIP MODEL
INTRODUCTION Chapter 2 ENTITY RELATIONSHIP MODEL Data model is used to describe data, data relationship and constraints on data. A number of different data models have proposed. They can broadly be classified
More informationNotes. These slides are based on a slide set provided by Prof. M. Tamer Öszu. CS 640 E-R Model Winter / 23. Notes
The Entity-Relationship Model Olaf Hartig David R. Cheriton School of Computer Science University of Waterloo CS 640 Principles of Database Management and Use Winter 203 These slides are based on a slide
More informationObjectives of logical design... Transforming the ERD diagram into relations. Relational database components. Mapping a composite attribute
Logical database design and the relational model Objectives of logical design... Translate the conceptual design into a logical database design that can be implemented on a chosen DBMS Input: conceptual
More informationLecture3: Data Modeling Using the Entity-Relationship Model.
College of Computer and Information Sciences - Information Systems Dept. Lecture3: Data Modeling Using the Entity-Relationship Model. Ref. Chapter12 Prepared by L. Nouf Almujally & Aisha AlArfaj Rev. by
More information1. Considering functional dependency, one in which removal from some attributes must affect dependency is called
Q.1 Short Questions Marks 1. Considering functional dependency, one in which removal from some attributes must affect dependency is called 01 A. full functional dependency B. partial dependency C. prime
More informationDATABASE DESIGN PROCESS
DATABASE DESIG PROCESS Miniworld Requirements Collection and Analysis Functional Requirements Database Requirements Functional Analysis Conceptual Design High-level Transaction Specification Conceptual
More informationER modeling. Lecture 4
ER modeling Lecture 4 1 Copyright 2007 STI - INNSBRUCK Today s lecture ER modeling Slides based on Introduction to Entity-relationship modeling at http://www.inf.unibz.it/~franconi/teaching/2000/ct481/er-modelling/
More informationChapter 7: Entity-Relationship Model
Chapter 7: Entity-Relationship Model Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Chapter 7: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram
More informationDatabase Systems ER Model. A.R. Hurson 323 CS Building
ER Model A.R. Hurson 323 CS Building Database Design Data model is a group of concepts that helps to specify the structure of a database and a set of associated operations allowing data retrieval and data
More informationChapter 6: Entity-Relationship Model
Chapter 6: Entity-Relationship Model Database System Concepts, 5th Ed. See www.db-book.com for conditions on re-use Chapter 6: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram
More informationThe Entity-Relationship Model. Steps in Database Design
The Entity-Relationship Model Steps in Database Design 1) Requirement Analysis Identify the data that needs to be stored data requirements Identify the operations that need to be executed on the data functional
More informationChapter 6: Entity-Relationship Model
Chapter 6: Entity-Relationship Model Database System Concepts, 5th Ed. See www.db-book.com for conditions on re-use Chapter 6: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram
More informationChapter 7: Entity-Relationship Model
Chapter 7: Entity-Relationship Model Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Chapter 7: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram
More informationConceptual Data Modeling
Conceptual Data odeling A data model is a way to describe the structure of the data. In models that are implemented it includes a set of operations that manipulate the data. A Data odel is a combination
More informationMTAT Introduction to Databases
MTAT.03.105 Introduction to Databases Lecture #4 Entity-Relationship Modelling Ljubov Jaanuska (ljubov.jaanuska@ut.ee) Lecture 3. Summary So far we have been dealing with a relational database (PCA.db)
More informationThe Entity-Relationship Model. Overview of Database Design. ER Model Basics. (Ramakrishnan&Gehrke, Chapter 2)
The Entity-Relationship Model (Ramakrishnan&Gehrke, Chapter 2) CS 432 Fall 2007 1 Overview of Database Design Conceptual design: (ER Model is used at this stage.) What are the entities and relationships
More informationChapter 7: Entity-Relationship Model
Chapter 7: Entity-Relationship Model Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Chapter 7: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram
More informationIntroduction to Database Design
ICS 321 Fall 2009 Introduction to Database Design Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa 09/03/2009 Lipyeow Lim -- University of Hawaii at Manoa
More informationEntity-Relationship Model. From Chapter 5, Kroenke book
Entity-Relationship Model From Chapter 5, Kroenke book Database Design Process Requirements analysis Conceptual design data model Logical design Schema refinement: Normalization Physical tuning Problem:
More informationKing Fahd University of Petroleum and Minerals
Exam 1 March 16, 2008 Page 1 of 7 King Fahd University of Petroleum and Minerals Department of Information and Computer Science ICS 324: Database Systems Spring 2007-2008 Date: 16-March-2008 Major Exam
More informationChapter 3 The Enhanced E-R Model
Chapter 3 The Enhanced E-R Model 1 Objectives Define terms Understand duse of supertype/subtype relationships Understand use of specialization and generalization techniques Specify completeness and disjointness
More informationRoadmap of This Lecture. Weak Entity Sets Extended E-R Features Reduction to Relation Schemas Database Design UML*
E-R Model (II) 1 Roadmap of This Lecture Weak Entity Sets Extended E-R Features Reduction to Relation Schemas Database Design UML* 2 Weak Entity Sets An entity set that does not have a primary key is referred
More informationChapter 6: Entity-Relationship Model. E-R Diagrams
Chapter 6: Entity-Relationship Model A database can be modeled as: a collection of entities, relationship among entities. An entity is an object that exists and is distinguishable from other objects. Example:
More informationChapter 7: Entity-Relationship Model
Chapter 7: Entity-Relationship Model, 7th Ed. See www.db-book.com for conditions on re-use Chapter 7: Entity-Relationship Model Design Process Modeling Constraints E-R Diagram Design Issues Weak Entity
More informationThe Entity-Relationship Model
The Entity-Relationship Model Chapter 2 Database Management Systems 3ed, R. Ramakrishnan and J. Gehrke 1 Overview of Database Design Conceptual design: (ER Model is used at this stage.) What are the entities
More informationChapter 4 Entity Relationship Modeling In this chapter, you will learn:
Chapter Entity Relationship Modeling In this chapter, you will learn: What a conceptual model is and what its purpose is The difference between internal and external models How internal and external models
More informationUnified Modeling Language (UML)
Appendix H Unified Modeling Language (UML) Preview The Unified Modeling Language (UML) is an object-oriented modeling language sponsored by the Object Management Group (OMG) and published as a standard
More informationIntroduction to Data Management. Lecture #3 (Conceptual DB Design)
Introduction to Data Management Lecture #3 (Conceptual DB Design) Instructor: Mike Carey mjcarey@ics.uci.edu Database Management Systems 3ed, R. Ramakrishnan and J. Gehrke 1 Announcements Reminders: Sign
More informationConceptual Database Design
Conceptual Database Design Fall 2009 Yunmook Nah Department of Electronics and Computer Engineering Dankook University Conceptual Database Design Methodology Chapter 15, Connolly & Begg Steps to Build
More informationCOSC 304 Introduction to Database Systems Enhanced Entity-Relationship (EER) Modeling
COSC 304 Introduction to Database Systems Enhanced Entity-Relationship (EER) Modeling Dr. Ramon Lawrence University of British Columbia Okanagan ramon.lawrence@ubc.ca Enhanced Entity-Relationship Modeling
More informationThe Entity-Relationship Model
The Entity-Relationship Model Chapter 2 Database Management Systems, R. Ramakrishnan and J. Gehrke 1 Overview of Database Design Conceptual design: (ER Model is used at this stage.) What are the entities
More informationCOMP 244. ER-Diagram Notations. Entity-Relationship Diagrams DATABASE CONCEPTS & APPLICATIONS. Database Concepts & Applications 1.
COMP 244 DATABASE CONCEPTS & APPLICATIONS ER-Diagram Notations Attribute Key Attribute Multi-valued attributes Entity-Relationship Diagrams Derived Attribute Weak Entity Identifying Relationship 1 2 Database
More informationThe DBMS accepts requests for data from the application program and instructs the operating system to transfer the appropriate data.
Managing Data Data storage tool must provide the following features: Data definition (data structuring) Data entry (to add new data) Data editing (to change existing data) Querying (a means of extracting
More informationDatabase Applications (15-415)
Database Applications (15-415) The Entity Relationship Model Lecture 2, January 15, 2014 Mohammad Hammoud Today Last Session: Course overview and a brief introduction on databases and database systems
More information