Uses Crows feet notation for ER Diagrams in ERwin

Size: px
Start display at page:

Download "Uses Crows feet notation for ER Diagrams in ERwin"

Transcription

1 ER odel Overview Entity types Attributes, keys Relationship types Weak entity types EER odel Outline Subclasses Specialization/Generalization Schea Design Single DB View integration in IS Uses Crows feet notation for ER Diagras in ERwin --The Entity Relationship Model(3)-- 1

2 Uses Crows feet notation for ER Diagras This is an alternative to the diaond representation of relationships. Diaond icons are replaced with lines, siplifying the ER schea. In ERwin, select IE -- Inforation Engineering Notation --The Entity Relationship Model(3)-- 2

3 Uses Crows feet notation for ER Diagras Intuition eans Entity eans Identifying relationship (one or zero to any) eans Many-to any relationship eans Non-identifying relationship (one or zero to any) --The Entity Relationship Model(3)-- 3

4 Uses Crows feet notation for ER Diagras in ERwin An identifying relationship is a relationship between two entities in which an instance of a child entity is identified through its association with a parent entity, which eans the child entity is dependent on the parent entity for its identify and cannot exist without it. In an identifying relationship, one instance of the parent entity is related to ultiple instances of the child. In IE notation, ERwin draws an identifying relationship line as a solid line with crows feet. --The Entity Relationship Model(3)-- 4

5 Uses Crows feet notation for ER Diagras in ERwin A non-identifying relationship is a relationship between two entities in which an instance of the child entity is not identified through its association with a parent entity, which eans the child entity is not dependent on the parent entity for its identify and can exist without it. In a non-identifying relationship, one instance of the parent entity is related to ultiple instances of the child. --The Entity Relationship Model(3)-- 5

6 Uses Crows feet notation for ER Diagras in ERwin In an optional nonidentifying relationship, the attributes that are igrated into the non-key area of the child entity are not required in the child entity. Therefore, nulls are allowed in the foreign key. --The Entity Relationship Model(3)-- 6

7 Uses Crows feet notation for ER Diagras in ERwin In a andatory nonidentifying relationship, the attributes that are igrated into the non-key area of the child entity are required in the child entity. Therefore, the foreign key cannot be null. --The Entity Relationship Model(3)-- 7

8 Many-To-One Relationship 1 A B C A The crow can be seen as a pictorial representation of "any". Each instance of the entity type A is associated with 0 or 1 instances of the entity type C. Each instance of the entity type C is associated with 0 to any instances of the entity type A. C --The Entity Relationship Model(3)-- 8

9 Many-To-Many Relationship A B C A C An instance of the entity type A is associated with possibly several instances of the entity type C. An instance of the entity type C is associated with possibly several instances of the entity type A. --The Entity Relationship Model(3)-- 9

10 Dependence An entity type that borrows a key is dependent. Needed for weak entity types 1 A B C A C --The Entity Relationship Model(3)-- 10

11 Many-To-Many Relationship, cont. Often any-to-any relationship types are resolved to two any-to-one relationship types by inserting an intersection entity type. A B C A B C Here, B is the intersection entity type. Note, it needs keys! This akes the conversion to tables easier, but can confuse the logical design. --The Entity Relationship Model(3)-- 11

12 Reducing Clutter on Entity Types In diaond notation, attributes occupy uch space ID DOB Custoer Nae Using ERwin, can extend entity type with attributes Custoer ID Nae DOB Note: have lost ability to odel ulti-valued, derived, and coposite attributes explicitly. --The Entity Relationship Model(3)-- 12

13 Other Notational Aspects Relationship types that have associated attributes ust be represented with intersection entity types. Details differ aong the various tools supporting variants of the Entity-Relationship scheas. For exaple, Soeties optional a dashed line is denoted with ("zero or") a circle. Cardinalities can soeties be placed at either end of a relationship arc. Other icons, such as sall diaonds, have specialized eanings. --The Entity Relationship Model(3)-- 13

14 CustoerID A DVD Store ER Schea TotalRes AountPaid ReturnDate Status NuCheckOuts Status CopyNu Custoer Rents DVD copy Nae Street City Address State Reserves n Copies 1 FilID Title Perforer n StarsIn Fil Kind Nae Role RentalPrice Distributor Director Date

15 Sae Schea convert to Erwin style --The Entity Relationship Model(3)-- 15

16 ER odel Overview Entity types Attributes, keys Relationship types Weak entity types Schea Design Single DB View integration in IS Outline Uses Crows feet notation for ER Diagras in ERwin --The Entity Relationship Model(3)-- 16

To identify entities and their relationships. To describe entities using attributes, multivalued attributes, derived attributes, and key attributes.

To identify entities and their relationships. To describe entities using attributes, multivalued attributes, derived attributes, and key attributes. CHAPTER 3 Database Design Objectives To use ER odeling to odel data. To identify entities and their relationships. To describe entities using attributes, ultivalued attributes, derived attributes, and

More information

Database Design Process

Database Design Process Database Design Process Entity-Relationship Model From Chapter 5, Kroenke book Requirements analysis Conceptual design data model Logical design Schema refinement: Normalization Physical tuning Problem:

More information

Database Design Process

Database Design Process Entity-Relationship Model Chapter 3, Part 1 Database Design Process Requirements analysis Conceptual design data model Logical design Schema refinement: Normalization Physical tuning 1 Problem: University

More information

Chapter 2: Entity-Relationship Model. Entity Sets. " Example: specific person, company, event, plant

Chapter 2: Entity-Relationship Model. Entity Sets.  Example: specific person, company, event, plant 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 information

Database Management Systems

Database Management Systems Database Management Systems Database Design (1) 1 Topics Information Systems Life Cycle Data Base Design Logical Design Physical Design Entity Relationship (ER) Model Entity Relationship Attributes Cardinality

More information

Chapter 2: Entity-Relationship Model. E-R R Diagrams

Chapter 2: Entity-Relationship Model. E-R R Diagrams Chapter 2: Entity-Relationship Model What s the use of the E-R model? Entity Sets Relationship Sets Design Issues Mapping Constraints Keys E-R Diagram Extended E-R Features Design of an E-R Database Schema

More information

Concepts of Database Management Seventh Edition. Chapter 6 Database Design 2: Design Method

Concepts of Database Management Seventh Edition. Chapter 6 Database Design 2: Design Method Concepts of Database Management Seventh Edition Chapter 6 Database Design 2: Design Method Objectives Discuss the general process and goals of database design Define user views and explain their function

More information

Designing Databases. Introduction

Designing Databases. Introduction Designing Databases C Introduction Businesses rely on databases for accurate, up-to-date information. Without access to mission critical data, most businesses are unable to perform their normal daily functions,

More information

Unit 2.1. Data Analysis 1 - V2.0 1. Data Analysis 1. Dr Gordon Russell, Copyright @ Napier University

Unit 2.1. Data Analysis 1 - V2.0 1. Data Analysis 1. Dr Gordon Russell, Copyright @ Napier University Data Analysis 1 Unit 2.1 Data Analysis 1 - V2.0 1 Entity Relationship Modelling Overview Database Analysis Life Cycle Components of an Entity Relationship Diagram What is a relationship? Entities, attributes,

More information

Database IST400/600. Jian Qin. A collection of data? A computer system? Everything you collected for your group project?

Database IST400/600. Jian Qin. A collection of data? A computer system? Everything you collected for your group project? Relational Databases IST400/600 Jian Qin Database A collection of data? Everything you collected for your group project? A computer system? File? Spreadsheet? Information system? Date s criteria: Integration

More information

Data Modeling with Entity-Relationship Diagrams

Data Modeling with Entity-Relationship Diagrams Riccardi04 6/28/02 0:20 P Page 6 CHAPTER4 Data odeling with Entity-Relationship Diagrams In this chapter, you will learn: What entity-relationship data modeling is How to read and draw entity-relationship

More information

Database Design Overview. Conceptual Design ER Model. Entities and Entity Sets. Entity Set Representation. Keys

Database Design Overview. Conceptual Design ER Model. Entities and Entity Sets. Entity Set Representation. Keys Database Design Overview Conceptual Design. The Entity-Relationship (ER) Model CS430/630 Lecture 12 Conceptual design The Entity-Relationship (ER) Model, UML High-level, close to human thinking Semantic

More information

CSC 742 Database Management Systems

CSC 742 Database Management Systems CSC 742 Database Management Systems Topic #4: Data Modeling Spring 2002 CSC 742: DBMS by Dr. Peng Ning 1 Phases of Database Design Requirement Collection/Analysis Functional Requirements Functional Analysis

More information

The Entity-Relationship Model

The Entity-Relationship Model The Entity-Relationship Model 221 After completing this chapter, you should be able to explain the three phases of database design, Why are multiple phases useful? evaluate the significance of the Entity-Relationship

More information

Using Entity-Relationship Diagrams To Count Data Functions Ian Brown, CFPS Booz Allen Hamilton 8283 Greensboro Dr. McLean, VA 22102 USA

Using Entity-Relationship Diagrams To Count Data Functions Ian Brown, CFPS Booz Allen Hamilton 8283 Greensboro Dr. McLean, VA 22102 USA Using Entity-Relationship Diagrams To Count Data Functions Ian Brown, CFPS Booz Allen Hamilton 8283 Greensboro Dr. McLean, VA 22102 USA Contents What Is an Entity-Relationship (E-R) Diagram? E-R Vocabulary

More information

Outline. Data Modeling. Conceptual Design. ER Model Basics: Entities. ER Model Basics: Relationships. Ternary Relationships. Yanlei Diao UMass Amherst

Outline. Data Modeling. Conceptual Design. ER Model Basics: Entities. ER Model Basics: Relationships. Ternary Relationships. Yanlei Diao UMass Amherst Outline Data Modeling Yanlei Diao UMass Amherst v Conceptual Design: ER Model v Relational Model v Logical Design: from ER to Relational Slides Courtesy of R. Ramakrishnan and J. Gehrke 1 2 Conceptual

More information

A Short Tutorial on Using Visio 2010 for Entity-Relationship Diagrams

A Short Tutorial on Using Visio 2010 for Entity-Relationship Diagrams A Short Tutorial on Using Visio 2010 for Entity-Relationship Diagrams by Nezar Hussain Microsoft Visio 2010 is a flexible software tool that allows users to create some diagrams and charts, providing an

More information

Fundamentals of Database System

Fundamentals of Database System Fundamentals of Database System Chapter 4 Normalization Fundamentals of Database Systems (Chapter 4) Page 1 Introduction To Normalization In general, the goal of a relational database design is to generate

More information

A brief overview of developing a conceptual data model as the first step in creating a relational database.

A brief overview of developing a conceptual data model as the first step in creating a relational database. Data Modeling Windows Enterprise Support Database Services provides the following documentation about relational database design, the relational database model, and relational database software. Introduction

More information

three Entity-Relationship Modeling chapter OVERVIEW CHAPTER

three Entity-Relationship Modeling chapter OVERVIEW CHAPTER three Entity-Relationship Modeling CHAPTER chapter OVERVIEW 3.1 Introduction 3.2 The Entity-Relationship Model 3.3 Entity 3.4 Attributes 3.5 Relationships 3.6 Degree of a Relationship 3.7 Cardinality of

More information

Doing database design with MySQL

Doing database design with MySQL Doing database design with MySQL Jerzy Letkowski Western New England University ABSTRACT Most of the database textbooks, targeting database design and implementation for information systems curricula support

More information

Data Analysis 1. SET08104 Database Systems. Copyright @ Napier University

Data Analysis 1. SET08104 Database Systems. Copyright @ Napier University Data Analysis 1 SET08104 Database Systems Copyright @ Napier University Entity Relationship Modelling Overview Database Analysis Life Cycle Components of an Entity Relationship Diagram What is a relationship?

More information

Entity - Relationship Modelling

Entity - Relationship Modelling Topic 5 Entity - Relationship Modelling LEARNING OUTCOMES When you have completed this Topic you should be able to: 1. Acquire the basic concepts of the Entity-Relationship (ER) model. 2. Discuss how to

More information

The Relational Model. Why Study the Relational Model? Relational Database: Definitions. Chapter 3

The Relational Model. Why Study the Relational Model? Relational Database: Definitions. Chapter 3 The Relational Model Chapter 3 Database Management Systems 3ed, R. Ramakrishnan and J. Gehrke 1 Why Study the Relational Model? Most widely used model. Vendors: IBM, Informix, Microsoft, Oracle, Sybase,

More information

The Relational Model. Why Study the Relational Model? Relational Database: Definitions

The Relational Model. Why Study the Relational Model? Relational Database: Definitions The Relational Model Database Management Systems, R. Ramakrishnan and J. Gehrke 1 Why Study the Relational Model? Most widely used model. Vendors: IBM, Microsoft, Oracle, Sybase, etc. Legacy systems in

More information

COMP 378 Database Systems Notes for Chapter 7 of Database System Concepts Database Design and the Entity-Relationship Model

COMP 378 Database Systems Notes for Chapter 7 of Database System Concepts Database Design and the Entity-Relationship Model COMP 378 Database Systems Notes for Chapter 7 of Database System Concepts Database Design and the Entity-Relationship Model The entity-relationship (E-R) model is a a data model in which information stored

More information

A Comparative Analysis of Entity-Relationship Diagrams 1

A Comparative Analysis of Entity-Relationship Diagrams 1 A Comparative Analysis of Entity-Relationship Diagrams 1 Il-Yeol Song Drexel University Mary Evans USConnect E.K. Park U.S. Naval Academy The purpose of this article is to collect widely used entity-relationship

More information

EXTENDED LEARNING MODULE A

EXTENDED LEARNING MODULE A EXTENDED LEARNING MODULE A DESIGNING DATABASES AND ENTITY- RELATIONSHIP DIAGRAMMING Student Learning Outcomes 1. Identify how databases and spreadsheets are both similar and different. 2. List and describe

More information

Data Modeling Basics

Data Modeling Basics Information Technology Standard Commonwealth of Pennsylvania Governor's Office of Administration/Office for Information Technology STD Number: STD-INF003B STD Title: Data Modeling Basics Issued by: Deputy

More information

Select the Crow s Foot entity relationship diagram (ERD) option. Create the entities and define their components.

Select the Crow s Foot entity relationship diagram (ERD) option. Create the entities and define their components. Α DESIGNING DATABASES WITH VISIO PROFESSIONAL: A TUTORIAL Microsoft Visio Professional is a powerful database design and modeling tool. The Visio software has so many features that we can t possibly demonstrate

More information

The E-R èentity-relationshipè data model views the real world as a set of basic objects èentitiesè and

The E-R èentity-relationshipè data model views the real world as a set of basic objects èentitiesè and CMPT-354-Han-95.3 Lecture Notes September 20, 1995 Chapter 2 The Entity-Relationship Model The E-R èentity-relationshipè data model views the real world as a set of basic objects èentitiesè and relationships

More information

Relational Database Concepts

Relational Database Concepts Relational Database Concepts IBM Information Management Cloud Computing Center of Competence IBM Canada Labs 1 2011 IBM Corporation Agenda Overview Information and Data Models The relational model Entity-Relationship

More information

Preview DESIGNING DATABASES WITH VISIO PROFESSIONAL: A TUTORIAL

Preview DESIGNING DATABASES WITH VISIO PROFESSIONAL: A TUTORIAL DESIGNING DATABASES WITH VISIO PROFESSIONAL: A TUTORIAL A Microsoft Visio Professional is a powerful database design and modeling tool. The Visio software has so many features that it is impossible to

More information

The Relational Model. Ramakrishnan&Gehrke, Chapter 3 CS4320 1

The Relational Model. Ramakrishnan&Gehrke, Chapter 3 CS4320 1 The Relational Model Ramakrishnan&Gehrke, Chapter 3 CS4320 1 Why Study the Relational Model? Most widely used model. Vendors: IBM, Informix, Microsoft, Oracle, Sybase, etc. Legacy systems in older models

More information

Database Design. Marta Jakubowska-Sobczak IT/ADC based on slides prepared by Paula Figueiredo, IT/DB

Database Design. Marta Jakubowska-Sobczak IT/ADC based on slides prepared by Paula Figueiredo, IT/DB Marta Jakubowska-Sobczak IT/ADC based on slides prepared by Paula Figueiredo, IT/DB Outline Database concepts Conceptual Design Logical Design Communicating with the RDBMS 2 Some concepts Database: an

More information

Lecture 6. SQL, Logical DB Design

Lecture 6. SQL, Logical DB Design Lecture 6 SQL, Logical DB Design Relational Query Languages A major strength of the relational model: supports simple, powerful querying of data. Queries can be written intuitively, and the DBMS is responsible

More information

Database Design Methodology

Database Design Methodology Database Design Methodology Three phases Database Design Methodology Logical database Physical database Constructing a model of the information used in an enterprise on a specific data model but independent

More information

2. Conceptual Modeling using the Entity-Relationship Model

2. Conceptual Modeling using the Entity-Relationship Model ECS-165A WQ 11 15 Contents 2. Conceptual Modeling using the Entity-Relationship Model Basic concepts: entities and entity types, attributes and keys, relationships and relationship types Entity-Relationship

More information

BİL 354 Veritabanı Sistemleri. Entity-Relationship Model

BİL 354 Veritabanı Sistemleri. Entity-Relationship Model BİL 354 Veritabanı Sistemleri Entity-Relationship Model Steps in building a DB application Pick application domain Conceptual design How can I describe that data? What data do I need for my application

More information

Data Modeling: Part 1. Entity Relationship (ER) Model

Data Modeling: Part 1. Entity Relationship (ER) Model Data Modeling: Part 1 Entity Relationship (ER) Model MBA 8473 1 Cognitive Objectives (Module 2) 32. Explain the three-step process of data-driven information system (IS) development 33. Examine the purpose

More information

Chapter 7 Data Modeling Using the Entity- Relationship (ER) Model

Chapter 7 Data Modeling Using the Entity- Relationship (ER) Model Chapter 7 Data Modeling Using the Entity- Relationship (ER) Model Copyright 2011 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Chapter 7 Outline Using High-Level Conceptual Data Models for

More information

ER modelling, Weak Entities, Class Hierarchies, Aggregation

ER modelling, Weak Entities, Class Hierarchies, Aggregation CS344 Database Management Systems ER modelling, Weak Entities, Class Hierarchies, Aggregation Aug 2 nd - Lecture Notes (Summary) Submitted by - N. Vishnu Teja Saurabh Saxena 09010125 09010145 (Most the

More information

CA ERwin Data Modeler. Implementation Guide

CA ERwin Data Modeler. Implementation Guide CA ERwin Data Modeler Implementation Guide r8 This documentation, which includes embedded help systems and electronically distributed materials, (hereinafter referred to as the Documentation ) is for your

More information

Relational Schema Design

Relational Schema Design Relational Schema Design Using ER Methodology to Design Relational Database Schemas The Development Process Collect requirements. Analyze the requirements. Conceptually design the data (e.g., draw an ER

More information

Database Systems. Session 3 Main Theme. Enterprise Data Modeling Using The Entity/Relationship (ER) Model. Dr. Jean-Claude Franchitti

Database Systems. Session 3 Main Theme. Enterprise Data Modeling Using The Entity/Relationship (ER) Model. Dr. Jean-Claude Franchitti Database Systems Session 3 Main Theme Enterprise Data Modeling Using The Entity/Relationship (ER) Model Dr. Jean-Claude Franchitti New York University Computer Science Department Courant Institute of Mathematical

More information

SCHEMAS AND STATE OF THE DATABASE

SCHEMAS AND STATE OF THE DATABASE SCHEMAS AND STATE OF THE DATABASE Schema the description of a database specified during database design relatively stable over time Database state the data in a database at a particular moment the set

More information

Data Modeling. Database Systems: The Complete Book Ch. 4.1-4.5, 7.1-7.4

Data Modeling. Database Systems: The Complete Book Ch. 4.1-4.5, 7.1-7.4 Data Modeling Database Systems: The Complete Book Ch. 4.1-4.5, 7.1-7.4 Data Modeling Schema: The structure of the data Structured Data: Relational, XML-DTD, etc Unstructured Data: CSV, JSON But where does

More information

Entity Relationship Diagram

Entity Relationship Diagram Yufei Tao Department of Computer Science and Engineering Chinese University of Hong Kong A primary goal of database design is to decide what tables to create. Usually, there are two principles: 1 Capture

More information

Foundations of Information Management

Foundations of Information Management Foundations of Information Management - WS 2012/13 - Juniorprofessor Alexander Markowetz Bonn Aachen International Center for Information Technology (B-IT) Data & Databases Data: Simple information Database:

More information

A technical discussion of UML 06/11/03 Relational Modeling with UML

A technical discussion of UML 06/11/03 Relational Modeling with UML A technical discussion of UML 06/11/03 Relational Modeling with UML Davor Gornik Improving software development capability 2 Table of Contents Relational Databases... 1 Core Elements of Relational Modeling...

More information

Data Modelling and E-R Diagrams

Data Modelling and E-R Diagrams Data Modelling and E-R Diagrams So far we have considered some of the basic ideas behind relational theory, and we will continue with this in subsequent sections. In this section we look at the processes

More information

Bridge from Entity Relationship modeling to creating SQL databases, tables, & relations

Bridge from Entity Relationship modeling to creating SQL databases, tables, & relations 1 Topics for this week: 1. Good Design 2. Functional Dependencies 3. Normalization Readings for this week: 1. E&N, Ch. 10.1-10.6; 12.2 2. Quickstart, Ch. 3 3. Complete the tutorial at http://sqlcourse2.com/

More information

Online Bagging and Boosting

Online Bagging and Boosting Abstract Bagging and boosting are two of the ost well-known enseble learning ethods due to their theoretical perforance guarantees and strong experiental results. However, these algoriths have been used

More information

IV. The (Extended) Entity-Relationship Model

IV. The (Extended) Entity-Relationship Model IV. The (Extended) Entity-Relationship Model The Extended Entity-Relationship (EER) Model Entities, Relationships and Attributes Cardinalities, Identifiers and Generalization Documentation of EER Diagrams

More information

Useful Number Systems

Useful Number Systems Useful Number Systems Decimal Base = 10 Digit Set = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} Binary Base = 2 Digit Set = {0, 1} Octal Base = 8 = 2 3 Digit Set = {0, 1, 2, 3, 4, 5, 6, 7} Hexadecimal Base = 16 = 2

More information

DATABASE MANAGEMENT SYSTEMS. Question Bank:

DATABASE MANAGEMENT SYSTEMS. Question Bank: DATABASE MANAGEMENT SYSTEMS Question Bank: UNIT 1 1. Define Database? 2. What is a DBMS? 3. What is the need for database systems? 4. Define tupule? 5. What are the responsibilities of DBA? 6. Define schema?

More information

Business Database Systems

Business Database Systems Preface Background The database is now the underlying framework of the information system and has fundamentally changed the way many companies and individuals work. The developments in this technology

More information

Requirement Analysis & Conceptual Database Design. Problem analysis Entity Relationship notation Integrity constraints Generalization

Requirement Analysis & Conceptual Database Design. Problem analysis Entity Relationship notation Integrity constraints Generalization Requirement Analysis & Conceptual Database Design Problem analysis Entity Relationship notation Integrity constraints Generalization Introduction: Lifecycle Requirement analysis -> Text Conceptual Design

More information

Databases Model the Real World. The Entity- Relationship Model. Conceptual Design. Steps in Database Design. ER Model Basics. ER Model Basics (Contd.

Databases Model the Real World. The Entity- Relationship Model. Conceptual Design. Steps in Database Design. ER Model Basics. ER Model Basics (Contd. The Entity- Relationship Model R &G - Chapter 2 A relationship, I think, is like a shark, you know? It has to constantly move forward or it dies. And I think what we got on our hands is a dead shark. Woody

More information

RELATIONSHIP STRENGTH

RELATIONSHIP STRENGTH Connectivity and Cardinality The term connectivity is used to describe the relationship classification. Cardinality expresses the minimum and maximum number of entity occurrences associated with one occurrence

More information

Fundamentals of Database Design

Fundamentals of Database Design Fundamentals of Database Design Zornitsa Zaharieva CERN Data Management Section - Controls Group Accelerators and Beams Department /AB-CO-DM/ 23-FEB-2005 Contents : Introduction to Databases : Main Database

More information

Lesson 8: Introduction to Databases E-R Data Modeling

Lesson 8: Introduction to Databases E-R Data Modeling Lesson 8: Introduction to Databases E-R Data Modeling Contents Introduction to Databases Abstraction, Schemas, and Views Data Models Database Management System (DBMS) Components Entity Relationship Data

More information

Animated Courseware Support for Teaching Database Design

Animated Courseware Support for Teaching Database Design Issue s in Informing Science and Information Technology Volume 6, 2009 Animated Courseware Support for Teaching Database Design Meg Murray and Mario Guimaraes Kennesaw State University, Kennesaw, GA, USA

More information

Method of supply chain optimization in E-commerce

Method of supply chain optimization in E-commerce MPRA Munich Personal RePEc Archive Method of supply chain optiization in E-coerce Petr Suchánek and Robert Bucki Silesian University - School of Business Adinistration, The College of Inforatics and Manageent

More information

Conceptual Design: Entity Relationship Models. Objectives. Overview

Conceptual Design: Entity Relationship Models. Objectives. Overview Conceptual Design: Entity Relationship Models Craig Van Slyke, University of Central Florida cvanslyke@bus.ucf.edu John Day, Ohio University Objectives Define terms related to entity relationship modeling,

More information

7.1 The Information system

7.1 The Information system Chapter 7. Database Planning, Design and Administration Last few decades have seen proliferation of software applications, many requiring constant maintenance involving: correcting faults, implementing

More information

Entity-Relationship Model

Entity-Relationship Model UNIT -2 Entity-Relationship Model Introduction to ER Model ER model is represents real world situations using concepts, which are commonly used by people. It allows defining a representation of the real

More information

APPENDIX B. Routers route based on the network number. The router that delivers the data packet to the correct destination host uses the host ID.

APPENDIX B. Routers route based on the network number. The router that delivers the data packet to the correct destination host uses the host ID. APPENDIX B IP Subnetting IP Addressing Routers route based on the network number. The router that delivers the data packet to the correct destination host uses the host ID. IP Classes An IP address is

More information

A. TRUE-FALSE: GROUP 2 PRACTICE EXAMPLES FOR THE REVIEW QUIZ:

A. TRUE-FALSE: GROUP 2 PRACTICE EXAMPLES FOR THE REVIEW QUIZ: GROUP 2 PRACTICE EXAMPLES FOR THE REVIEW QUIZ: Review Quiz will contain very similar question as below. Some questions may even be repeated. The order of the questions are random and are not in order of

More information

not necessarily strictly sequential feedback loops exist, i.e. may need to revisit earlier stages during a later stage

not necessarily strictly sequential feedback loops exist, i.e. may need to revisit earlier stages during a later stage Database Design Process there are six stages in the design of a database: 1. requirement analysis 2. conceptual database design 3. choice of the DBMS 4. data model mapping 5. physical design 6. implementation

More information

Lecture Notes INFORMATION RESOURCES

Lecture Notes INFORMATION RESOURCES Vilnius Gediminas Technical University Jelena Mamčenko Lecture Notes on INFORMATION RESOURCES Part I Introduction to Dta Modeling and MSAccess Code FMITB02004 Course title Information Resourses Course

More information

Red Hat Enterprise Linux: Creating a Scalable Open Source Storage Infrastructure

Red Hat Enterprise Linux: Creating a Scalable Open Source Storage Infrastructure Red Hat Enterprise Linux: Creating a Scalable Open Source Storage Infrastructure By Alan Radding and Nick Carr Abstract This paper discusses the issues related to storage design and anageent when an IT

More information

Lecture 12: Entity Relationship Modelling

Lecture 12: Entity Relationship Modelling Lecture 12: Entity Relationship Modelling The Entity-Relationship Model Entities Relationships Attributes Constraining the instances Cardinalities Identifiers Generalization 2004-5 Steve Easterbrook. This

More information

Chapter 2: Entity-Relationship Model

Chapter 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 Schema to

More information

Entity/Relationship Modelling. Database Systems Lecture 4 Natasha Alechina

Entity/Relationship Modelling. Database Systems Lecture 4 Natasha Alechina Entity/Relationship Modelling Database Systems Lecture 4 Natasha Alechina In This Lecture Entity/Relationship models Entities and Attributes Relationships Attributes E/R Diagrams For more information Connolly

More information

Overview. Database Security. Relational Database Basics. Semantic Integrity Controls. Access Control Rules- Name dependent access

Overview. Database Security. Relational Database Basics. Semantic Integrity Controls. Access Control Rules- Name dependent access Database ecurity ione FischerHübner Applied ecurity, DAVC7 Overview eantic Integrity Controls Access Control Rules Multilevel ecure Databases RBAC in Coercial DBM tatistical Database ecurity Relational

More information

Toad Data Modeler - Features Matrix

Toad Data Modeler - Features Matrix Toad Data Modeler - Features Matrix Functionality Commercial Trial Freeware Notes General Features Physical Model (database specific) Universal Model (generic physical model) Logical Model (support for

More information

Applying Multiple Neural Networks on Large Scale Data

Applying Multiple Neural Networks on Large Scale Data 0 International Conference on Inforation and Electronics Engineering IPCSIT vol6 (0) (0) IACSIT Press, Singapore Applying Multiple Neural Networks on Large Scale Data Kritsanatt Boonkiatpong and Sukree

More information

Exercise 1: Relational Model

Exercise 1: Relational Model Exercise 1: Relational Model 1. Consider the relational database of next relational schema with 3 relations. What are the best possible primary keys in each relation? employ(person_name, street, city)

More information

PREDICTION OF POSSIBLE CONGESTIONS IN SLA CREATION PROCESS

PREDICTION OF POSSIBLE CONGESTIONS IN SLA CREATION PROCESS PREDICTIO OF POSSIBLE COGESTIOS I SLA CREATIO PROCESS Srećko Krile University of Dubrovnik Departent of Electrical Engineering and Coputing Cira Carica 4, 20000 Dubrovnik, Croatia Tel +385 20 445-739,

More information

Review Entity-Relationship Diagrams and the Relational Model. Data Models. Review. Why Study the Relational Model? Steps in Database Design

Review Entity-Relationship Diagrams and the Relational Model. Data Models. Review. Why Study the Relational Model? Steps in Database Design Review Entity-Relationship Diagrams and the Relational Model CS 186, Fall 2007, Lecture 2 R & G, Chaps. 2&3 Why use a DBMS? OS provides RAM and disk A relationship, I think, is like a shark, you know?

More information

Databases What the Specification Says

Databases What the Specification Says Databases What the Specification Says Describe flat files and relational databases, explaining the differences between them; Design a simple relational database to the third normal form (3NF), using entityrelationship

More information

Roland Berger Strategy Consultants. content. Fresh thinking for decision makers

Roland Berger Strategy Consultants. content. Fresh thinking for decision makers Roland Berger Strategy Consultants content Fresh thinking for decision akers Opportunities for obile telephone operators in rural areas Custoers in the countryside are different They need unique offerings

More information

Entity-Relationship Model. Purpose of E/R Model. Entity Sets

Entity-Relationship Model. Purpose of E/R Model. Entity Sets Entity-Relationship Model Diagrams Class hierarchies Weak entity sets 1 Purpose of E/R Model The E/R model allows us to sketch the design of a database informally. Designs are pictures called entityrelationship

More information

Enhanced-ER Data Model

Enhanced-ER Data Model CS4710 Introduction to Database Systems Enhanced-ER Data Model Instructor: Yi-Shin Chen Office: EECS 3201 Email: yishin@cs.nthu.edu.tw Office Hour: Tu. 1-2PM, Th. 3-4pm Motivation ER data model is useful

More information

DATABASE DESIGN. - Developing database and information systems is performed using a development lifecycle, which consists of a series of steps.

DATABASE DESIGN. - Developing database and information systems is performed using a development lifecycle, which consists of a series of steps. DATABASE DESIGN - The ability to design databases and associated applications is critical to the success of the modern enterprise. - Database design requires understanding both the operational and business

More information

The Entity-Relationship Model

The Entity-Relationship Model The Entity-Relationship Model Chapter 2 Slides modified by Rasmus Pagh for Database Systems, Fall 2006 IT University of Copenhagen Database Management Systems 3ed, R. Ramakrishnan and J. Gehrke 1 Today

More information

Converting E-R Diagrams to Relational Model. Winter 2006-2007 Lecture 17

Converting E-R Diagrams to Relational Model. Winter 2006-2007 Lecture 17 Converting E-R Diagrams to Relational Model Winter 2006-2007 Lecture 17 E-R Diagrams Need to convert E-R model diagrams to an implementation schema Easy to map E-R diagrams to relational model, and then

More information

XV. The Entity-Relationship Model

XV. The Entity-Relationship Model XV. The Entity-Relationship Model The Entity-Relationship Model Entities, Relationships and Attributes Cardinalities, Identifiers and Generalization Documentation of E-R Diagrams and Business Rules The

More information

Fuzzy Sets in HR Management

Fuzzy Sets in HR Management Acta Polytechnica Hungarica Vol. 8, No. 3, 2011 Fuzzy Sets in HR Manageent Blanka Zeková AXIOM SW, s.r.o., 760 01 Zlín, Czech Republic blanka.zekova@sezna.cz Jana Talašová Faculty of Science, Palacký Univerzity,

More information

On Development of Fuzzy Relational Database Applications

On Development of Fuzzy Relational Database Applications On Development of Fuzzy Relational Database Applications Srdjan Skrbic Faculty of Science Trg Dositeja Obradovica 3 21000 Novi Sad Serbia shkrba@uns.ns.ac.yu Aleksandar Takači Faculty of Technology Bulevar

More information

2.0 Welcome...2. 2.1 Introduction... 2. 2.2 What is the Scope?...3. 2.3 What are the Things of Interest?... 4. 2.4 Creating Entities...

2.0 Welcome...2. 2.1 Introduction... 2. 2.2 What is the Scope?...3. 2.3 What are the Things of Interest?... 4. 2.4 Creating Entities... 2. Some Basic Concepts...2 2.0 Welcome...2 2.1 Introduction... 2 2.2 What is the Scope?...3 2.3 What are the Things of Interest?... 4 2.4 Creating Entities... 4 2.5 Primary Keys... 5 2.6 Foreign Keys...

More information

CPU Animation. Introduction. CPU skinning. CPUSkin Scalar:

CPU Animation. Introduction. CPU skinning. CPUSkin Scalar: CPU Aniation Introduction The iportance of real-tie character aniation has greatly increased in odern gaes. Aniating eshes ia 'skinning' can be perfored on both a general purpose CPU and a ore specialized

More information

CRM FACTORS ASSESSMENT USING ANALYTIC HIERARCHY PROCESS

CRM FACTORS ASSESSMENT USING ANALYTIC HIERARCHY PROCESS 641 CRM FACTORS ASSESSMENT USING ANALYTIC HIERARCHY PROCESS Marketa Zajarosova 1* *Ph.D. VSB - Technical University of Ostrava, THE CZECH REPUBLIC arketa.zajarosova@vsb.cz Abstract Custoer relationship

More information

How To Get A Loan From A Bank For Free

How To Get A Loan From A Bank For Free Finance 111 Finance We have to work with oney every day. While balancing your checkbook or calculating your onthly expenditures on espresso requires only arithetic, when we start saving, planning for retireent,

More information

DATABASE INTRODUCTION

DATABASE INTRODUCTION Introduction The history of database system research is one of exceptional productivity and startling economic impact. We have learnt that from the days of file-based systems there are better ways to handle

More information

Collated Food Requirements. Received orders. Resolved orders. 4 Check for discrepancies * Unmatched orders

Collated Food Requirements. Received orders. Resolved orders. 4 Check for discrepancies * Unmatched orders Introduction to Data Flow Diagrams What are Data Flow Diagrams? Data Flow Diagrams (DFDs) model that perspective of the system that is most readily understood by users the flow of information around the

More information

A Little Set Theory (Never Hurt Anybody)

A Little Set Theory (Never Hurt Anybody) A Little Set Theory (Never Hurt Anybody) Matthew Saltzman Department of Mathematical Sciences Clemson University Draft: August 21, 2013 1 Introduction The fundamental ideas of set theory and the algebra

More information