SCHEMAS AND STATE OF THE DATABASE

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "SCHEMAS AND STATE OF THE DATABASE"

Transcription

1 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 of occurrences or instances DataBase Management 29

2 DATABASE SYSTEM ARCHITECTURE Main characteristics of the database approach are: i. Provision of data and program independence ii. support of multiple user views iii. use of a catalogue to store the database description. This is achieved by the Three-Schema Architecture. Internal (physical) level o Describes physical storage structure of database Conceptual and logical levels o Describes the structure of the whole database - describing entities, data types, relationships, user operations and constraints with no concern of the physical storage details External (view) level o Describes the part of the database that a particular user group is interested in and hides the rest of the database from that user group. DataBase Management 30

3 DATABASE SYSTEM ARCHITECTURE The Three-Schema Architecture External view 1 External/conceptual mapping END USERS External view 2 Conceptual/internal mapping Conceptual Schema Internal Schema STORED DATABASE DataBase Management 31

4 DATABASE SYSTEMS DESIGN AND IMPLEMENTATION USER REQUIREMENTS ENGLISH DESCRIPTION CONCEPTUAL DESIGN ER MODEL LOGICAL DESIGN DATA MODEL PHYSICAL DESIGN FILE ANS INDEX DESIGN IMPLEMENTATION TARGET DBMS SELECTION TESTING & INSTALLATION DataBase Management 32

5 CONCEPTUAL DESIGN Input: requirements specification Output: conceptual schema Conceptual schema is a high level description of the structure of the database, independent of the particular DBMS software. A conceptual model is a language that is used to describe conceptual schemas. The purpose of conceptual design is to describe the information content of the database rather than the storage structures. DataBase Management 33

6 LOGICAL DESIGN Input: conceptual schema Output: logical schema Logical schema is a description of the structure of the database that can be processed by the DBMS software. A logical model is a language that is used to specify logical schemas. Logical design depends on the class of data model used by the DBMS, but not on the specific DBMS used. Logical Models o Relational Model o Network Model o Hierarchical Model o Object-oriented DataBase Management 34

7 PHYSICAL DESIGN Input: logical schema Output: physical schema A physical schema is a description of the implementation of the database in secondary memory. It describes the storage structures and access methods used in the system. There is feedback between physical and logical design, because decisions taken during physical design for improving performance might affect the structure of the logical schema. Once the physical database design is completed, the logical and physical schemas are expressed using the data definition language of the target DBMS. The database is created and populated, and can be tested. DataBase Management 35

8 DATA MODELING In designing a database for an enterprise, initially one has to identify and state what data needs to be stored the data requirements. Example: Stock control application- Each stock item has a stock number, a description, price, quantity in stock, reorder level and supplier Each item has only one supplier From this statement of data requirements a conceptual data model is produced. OPERATIONAL DATA = ENTITIES + RELATIONSHIPS E.g. suppliers E.g. suppliers supplies a certain kind of part hence link between supplier and part entities DataBase Management 36

9 THE CONCEPTUAL DATA MODEL A conceptual data model describes how the data elements in the system are to be grouped. Three terms are used in building a picture of the data requirements. An entity is a thing of interest to an organization about which data is to be stored. - Example: stock, supplier, An attribute is a property or characteristic of an entity. - Example: stock item description A relationship is a link or association between entities.- Example: link between stock items and suppliers: - one supplier may supply many stock items This conceptual/logical model is created without any regard to what type of database system will eventually be used to implement it. Example: the entity stock and its attributes are expressed as follows: STOCK(part_number, description, price, quantity, reorder level, supplier) DataBase Management 37

10 TYPES OF RELATIONSHIPS Each relationship has a name (e.g. supplies) and the cardinality, which may be any of: one-to-one one-to-many (or many-to-one) many-to-many Example :- the relationship between supplier and stock: Name : supplies (as indicated) Cardinality: one-to-many (a supplier supplies many stock items) DataBase Management 38

11 OTHER EXAMPLES E.g. 1: One-to-one: a specialist is assigned to a single ward (Given that a specialist has one ward of patients under his care) E.g. 2: One-to-many: a hospital ward occupied by many patients (but a patient is assigned to only one ward). E.g. 3: Many-to-many: a student may study several courses, each course has many students enrolled on it. Exercise: Identify the relationship between these entities: stock item and supplier CD and song Borrower and book Brother and Sister Bank Account and Customer DataBase Management 39

12 ENTITY-RELATIONSHIP DIAGRAMS (E-R DIAGRAMS) An entity-relationship diagram is a diagrammatic way of representing the relationships between the entities in a database. To show the relationship between two entities, both the cardinality and the name of the relationship need to be specified. An E-R diagram illustrates the entities and their relationships for a specific system. visits SPECIALIST WARD accommodates WARD PATIENTS enrolls STUDENT COURSE DataBase Management 40

13 EXAMPLE 1 The data requirements for a hospital in-patient system are defined as follows: A hospital is organized into a number of wards. Each ward has a ward number and a name recorded, along with a number of beds in that ward. Each ward is staffed by nurses. Nurses have their staff number and name recorded, and are assigned to a single ward. Each patient in the hospital has a patient identification number, and their name, address and date of birth are recorded. Each patient is under the care of a single consultant and is assigned to a single ward. Each consultant is responsible for a number of patients. Consultants have their staff number, name and specialization recorded (Adapted from Heathcote). 1. State four entities for the hospital in-patient system and suggest an identifier for each of these entities. 2. Draw an entity-relationship diagram to show the relationship between the entities. DataBase Management 41

14 SOLUTION ENTITY Ward Nurse Patient Consultant Instance identification Ward Number Staff Number Patient Identification Number Staff Number WARD is assigned NURSE accommodates PATIENT visits CONSULTANT DataBase Management 42

15 EXAMPLE 2 In a mail order system, a customer may place an order for several items. Over a period of time, the same customer may place several orders. Entities: Customer, Item, Order Drawing an E-R diagram to represent this situation: CUSTOMER ORDER ORDER ITEM relationship pairs CUSTOMER sends ORDER is for ITEM DataBase Management 43

16 Solution An alternative data model decomposing the many-to-many relationship between order and items: CUSTOMER sends ORDER includes ITEM ORD_ITEM matches An order includes a number of ordered items. A particular item may be ordered in different orders (hence matches 0, 1 or many ordered item records). DataBase Management 44

17 Exercise The data requirements for a booking system are defined as follows: An agency arranges booking of live bands for a number of clubs. Each band is registered with the agency and has its name (unique) recorded, together with the number of musicians, the type of music played and hiring fee. Each band is managed by a manager. A manager may manage several bands. Each manager is assigned an identification number and managers have their name, address and telephone number recorded. Each club is assigned an identification number and clubs have their name, address and telephone number recorded. The agency records details of each booking made between a band and a club for a given date. A band will never have more than one booking on any particular date. 1. State four entities for this booking system and suggest an identifier for each of these entities. 2. Draw an entity-relationship diagram to show the relationship between the entities. DataBase Management 45

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

Basic Database Concepts

Basic Database Concepts Tore Risch Uppsala University, Sweden UDBL Basic Database Concepts What is a database? A database is a collection of related data stored in a computer managed by a DBMS. What is a DBMS, Database Management

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

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

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

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

Entity-Relationship (ER) Model

Entity-Relationship (ER) Model ER Design (1) Entity-Relationship (ER) Model Elements in a database: data entries Data entries represent Entities: data objects, e.g., students, courses, and instructors Relationships among entities: students

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

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

THE 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) THE ENTITY- RELATIONSHIP (ER) MODEL CHAPTER 7 (6/E) CHAPTER 3 (5/E) 2 LECTURE OUTLINE Using High-Level, Conceptual Data Models for Database Design Entity-Relationship (ER) model Popular high-level conceptual

More information

Data Model ing Essentials

Data Model ing Essentials Data Model ing Essentials Third Edition Graeme C. Simsion and Graham C. Witt MORGAN KAUFMANN PUBLISHERS AN IMPRINT OF ELSEVIER AMSTERDAM BOSTON LONDON NEW YORK OXFORD PARIS SAN DIEGO SAN FRANCISCO SINGAPORE

More information

Designing a Database Schema

Designing a Database Schema Week 10: Database Design Database Design From an ER Schema to a Relational One Restructuring an ER schema Performance Analysis Analysis of Redundancies, Removing Generalizations Translation into a Relational

More information

Entity-Relationship Model. Modeling. Entity-Relationship Model. How do we design the database for an application?

Entity-Relationship Model. Modeling. Entity-Relationship Model. How do we design the database for an application? How do we design the database for an application? Entity-Relationship Model Dr. McNamara CSCI 371 Databases Fall 2006 1. Conceptual Design: Analyze the problem. Identify the entities, relationships, and

More information

HNDIT 1105 Database Management Systems

HNDIT 1105 Database Management Systems HNDIT 1105 Database Management Systems Lesson 02: Database Design Process & ER Diagrams By S. Sabraz Nawaz M.Sc. In IS (SLIIT), PGD in IS (SLIIT), BBA (Hons.) Spl. in IS (SEUSL), MIEEE, MAIS Senior Lecturer

More information

Database Design. October 24, 2008. Database Design

Database Design. October 24, 2008. Database Design October 24, 2008 Outline E-R diagrams Represent logical structure simply, clearly Rectangles: entity sets Ellipses: attributes Diamonds: relationship sets Lines: linking elements Double ellipse: multi-valued

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

Database Design and the Entity-Relationship Model

Database Design and the Entity-Relationship Model Database Design and the Entity-Relationship Model Computer Science 460/660 Boston University Fall 2013 David G. Sullivan, Ph.D. Database Design In database design, we determine: which data fields to include

More information

Entity-Relationship Model. Database Modeling (Part 1) Entity. Entity-Relationship Model EMPLOYEE

Entity-Relationship Model. Database Modeling (Part 1) Entity. Entity-Relationship Model EMPLOYEE Entity-Relationship Model Database Modeling (Part 1) A conceptual data model, which is a representation of the structure of a database that is independent of the software that will be used to implement

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

DATABASE SYSTEM CONCEPTS AND ARCHITECTURE CHAPTER 2

DATABASE SYSTEM CONCEPTS AND ARCHITECTURE CHAPTER 2 1 DATABASE SYSTEM CONCEPTS AND ARCHITECTURE CHAPTER 2 2 LECTURE OUTLINE Data Models Three-Schema Architecture and Data Independence Database Languages and Interfaces The Database System Environment DBMS

More information

Overview. Physical Database Design. Modern Database Management McFadden/Hoffer Chapter 7. Database Management Systems Ramakrishnan Chapter 16

Overview. Physical Database Design. Modern Database Management McFadden/Hoffer Chapter 7. Database Management Systems Ramakrishnan Chapter 16 HNC Computing - s HNC Computing - s Physical Overview Process What techniques are available for physical design? Physical Explain one physical design technique. Modern Management McFadden/Hoffer Chapter

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

BCS Certificate in Data Management Essentials

BCS Certificate in Data Management Essentials BCS Certificate in Data Management Essentials Sample Paper A You are allowed fifteen (15) minutes reading time before the examination starts. You are not allowed to write anything during that reading time.

More information

Introduction to Computing. Lectured by: Dr. Pham Tran Vu t.v.pham@cse.hcmut.edu.vn

Introduction to Computing. Lectured by: Dr. Pham Tran Vu t.v.pham@cse.hcmut.edu.vn Introduction to Computing Lectured by: Dr. Pham Tran Vu t.v.pham@cse.hcmut.edu.vn Databases The Hierarchy of Data Keys and Attributes The Traditional Approach To Data Management Database A collection of

More information

DATABASE SCHEMA DESIGN ENTITY-RELATIONSHIP MODEL. CS121: Introduction to Relational Database Systems Fall 2015 Lecture 14

DATABASE SCHEMA DESIGN ENTITY-RELATIONSHIP MODEL. CS121: Introduction to Relational Database Systems Fall 2015 Lecture 14 DATABASE SCHEMA DESIGN ENTITY-RELATIONSHIP MODEL CS121: Introduction to Relational Database Systems Fall 2015 Lecture 14 Designing Database Applications 2 Database applications are large and complex A

More information

Unit 5: Object-Role Modeling (ORM) http://www.heppnetz.de/teaching/dpm/

Unit 5: Object-Role Modeling (ORM) http://www.heppnetz.de/teaching/dpm/ Modeling in Business in Information Systems Unternehmensmodellierung und -architekturen Unit 5: Object-Role Modeling (ORM) Professur für Allgemeine BWL, insbesondere E-Business http://www.heppnetz.de/teaching/dpm/

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

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

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

Chapter 3. Data Modeling Using the Entity-Relationship (ER) Model

Chapter 3. Data Modeling Using the Entity-Relationship (ER) Model Chapter 3 Data Modeling Using the Entity-Relationship (ER) Model Chapter Outline Overview of Database Design Process Example Database Application (COMPANY) ER Model Concepts Entities and Attributes Entity

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

Chapter 2 Database System Concepts and Architecture

Chapter 2 Database System Concepts and Architecture Chapter 2 Database System Concepts and Architecture Copyright 2011 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Chapter 2 Outline Data Models, Schemas, and Instances Three-Schema Architecture

More information

G Barnaby Electronics Ltd case Study - Comparison of Entity-Relationship and Normalisation Database Designs

G Barnaby Electronics Ltd case Study - Comparison of Entity-Relationship and Normalisation Database Designs G Barnaby Electronics Ltd case Study - Comparison of Entity-Relationship and Normalisation Database Designs G.1 Compare the two Database Designs created from the Entity-Relationship Model and Normalisation

More information

Documentation techniques and databases

Documentation techniques and databases MONITORING REPORTING SYSTEMS AND REVIEWING REPORTING PROCEDURES Documentation techniques and databases c h a p t e r 3 Learning objectives To learn about data flow diagrams (DFDs) and the symbols used

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

Information Management

Information Management Information Management Dr Marilyn Rose McGee-Lennon mcgeemr@dcs.gla.ac.uk What is Information Management about Aim: to understand the ways in which databases contribute to the management of large amounts

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

Database Development Cycle

Database Development Cycle Database Development Cycle Connolly/Begg Chapter 9 Overview Application Development Life Cycle Relationship to Databases Database Design Three levels Data Models Entity-Relationship Model Relational Model

More information

Mapping Data Models to a Relational Database

Mapping Data Models to a Relational Database Mapping Data Models to a Relational Database Time to dovetail two prior topics: data modeling (E-R, UML) and the relational data model (structure, algebra) To recap, this is how they relate: The data model

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

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

The Entity-Relationship Model. Steps in Database Design

The 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 information

ETEC 2601 Database Systems

ETEC 2601 Database Systems ETEC 2601 Database Systems Chapter 5: Data Modeling With The Entity-Relationship Model Copyright 2004-2010 J. B. Gallaher The Data Model The design of a database Is the way the user conceives the information

More information

5.5 Copyright 2011 Pearson Education, Inc. publishing as Prentice Hall. Figure 5-2

5.5 Copyright 2011 Pearson Education, Inc. publishing as Prentice Hall. Figure 5-2 Class Announcements TIM 50 - Business Information Systems Lecture 15 Database Assignment 2 posted Due Tuesday 5/26 UC Santa Cruz May 19, 2015 Database: Collection of related files containing records on

More information

Gov 1008 Introduction to Geographical Information Systems

Gov 1008 Introduction to Geographical Information Systems Gov 1008 Introduction to Geographical Information Systems Lecture 5: Creating Data and Maintaining Databases Sumeeta Srinivasan References include: Bolstad; Worboys; NCGIA Core Curriculum: csiss.org/learning_resources/content/giscc/giscc_contents.html;

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

Component 4: Introduction to Information and Computer Science

Component 4: Introduction to Information and Computer Science Component 4: Introduction to Information and Computer Science Unit 6: Databases and SQL Lecture 2 This material was developed by Oregon Health & Science University, funded by the Department of Health and

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

INTRODUCTION TO DATABASE DESIGN

INTRODUCTION TO DATABASE DESIGN 2 INTRODUCTION TO DATABASE DESIGN Exercise 2.1 Explain the following terms briefly: attribute, domain, entity, relationship, entity set, relationship set, one-to-many relationship, many-to-many relationship,

More information

Topics Databases. Behind the Scenes: Database Management Systems Models. Hierarchical Database one-to-many relationship. Hierarchical Database

Topics Databases. Behind the Scenes: Database Management Systems Models. Hierarchical Database one-to-many relationship. Hierarchical Database Topics Databases Behind the Scenes: Database Management Systems Models Describe the five database management systems (DBMS) models Distinguish among the different types of databases based on accessibility

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

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

COMHAIRLE NÁISIÚNTA NA NATIONAL COUNCIL FOR VOCATIONAL AWARDS PILOT. Consultative Draft Module Descriptor. Relational Database

COMHAIRLE NÁISIÚNTA NA NATIONAL COUNCIL FOR VOCATIONAL AWARDS PILOT. Consultative Draft Module Descriptor. Relational Database COMHAIRLE NÁISIÚNTA NA gcáilíochtaí GAIRMOIDEACHAIS NATIONAL COUNCIL FOR VOCATIONAL AWARDS PILOT Consultative Draft Module Descriptor Relational Database Level 3 C30147 December 1998 1 Title Relational

More information

ECS 165A: Introduction to Database Systems

ECS 165A: Introduction to Database Systems ECS 165A: Introduction to Database Systems Todd J. Green based on material and slides by Michael Gertz and Bertram Ludäscher Winter 2011 Dept. of Computer Science UC Davis ECS-165A WQ 11 1 1. Introduction

More information

D.Hemavathi,R.Venkatalakshmi Assistant Professor, SRM University, Kattankulathur

D.Hemavathi,R.Venkatalakshmi Assistant Professor, SRM University, Kattankulathur DATABASE SYSTEMS IT 0303 5 TH Semester D.Hemavathi,R.Venkatalakshmi Assistant Professor, SRM University, Kattankulathur School of Computing, Department of IT Unit 2:Entity Relationship Model Disclaimer

More information

Data Modeling and Database Design Using ERwin

Data Modeling and Database Design Using ERwin Data Modeling and Database Design Using ERwin PRACTICAL DATA MODELING and DATABASE DESIGN USING ERWIN Before Database Design ERWIN Reports Samples Erwin*; A Data Modeling and Database Design Application

More information

ETEC 430 Database Systems

ETEC 430 Database Systems ETEC 430 Database Systems Chapter 2: Entity-Relationship Data Modeling: Tools and Techniques Copyright 2004 J. B. Gallaher ANSI/SPARC Three Schema Model External Schema User view = how the users view the

More information

Physical Database Design Process. Physical Database Design Process. Major Inputs to Physical Database. Components of Physical Database Design

Physical Database Design Process. Physical Database Design Process. Major Inputs to Physical Database. Components of Physical Database Design Physical Database Design Process Physical Database Design Process The last stage of the database design process. A process of mapping the logical database structure developed in previous stages into internal

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

The Entity-Relationship Model

The Entity-Relationship Model The Entity-Relationship Model Overview of Database Design Requirements analysis Conceptual design data model Logical design Schema refinement: Normalization Physical tuning Conceptual Design Entities Conceptual

More information

Systems Analysis and Design

Systems Analysis and Design Systems Analysis and Design Slides adapted from Jeffrey A. Hoffer, University of Dayton Joey F. George, Florida State University Joseph S. Valacich, Washington State University Modern Systems Analysis

More information

OVERVIEW 1.1 DATABASE MANAGEMENT SYSTEM (DBMS) DEFINITION:-

OVERVIEW 1.1 DATABASE MANAGEMENT SYSTEM (DBMS) DEFINITION:- 1 1 OVERVIEW Topics Covered: 1.1 Database management system 1.2 Data Independence 1.3 Data Abstraction 1.4 Data Models 1.5 DBMS Architecture 1.6 Users of DBMS 1.7 Overview of Conventional Data Models 1.1

More information

CSCD43: Database Systems Technology. Lecture 2

CSCD43: Database Systems Technology. Lecture 2 Lecture 2 Wael Aboulsaadat Acknowledgment: these slides are based on Prof. Garcia-Molina & Prof. Ullman slides accompanying the course s textbook. Steps in Database Design Conceptual Design Logical Design

More information

Foundations of Business Intelligence: Databases and Information Management

Foundations of Business Intelligence: Databases and Information Management Chapter 5 Foundations of Business Intelligence: Databases and Information Management 5.1 Copyright 2011 Pearson Education, Inc. Student Learning Objectives How does a relational database organize data,

More information

CPSC 304 Introduction to Database Systems

CPSC 304 Introduction to Database Systems CPSC 304 Introduction to Database Systems Conceptual Database Design The Entity-Relationship Model Textbook Reference Database Management Systems: Chapter 2 Hassan Khosravi Borrowing many slides from Rachel

More information

THE OPEN UNIVERSITY OF TANZANIA FACULTY OF SCIENCE TECHNOLOGY AND ENVIRONMENTAL STUDIES BACHELOR OF SIENCE IN DATA MANAGEMENT

THE OPEN UNIVERSITY OF TANZANIA FACULTY OF SCIENCE TECHNOLOGY AND ENVIRONMENTAL STUDIES BACHELOR OF SIENCE IN DATA MANAGEMENT THE OPEN UNIVERSITY OF TANZANIA FACULTY OF SCIENCE TECHNOLOGY AND ENVIRONMENTAL STUDIES BACHELOR OF SIENCE IN DATA MANAGEMENT ODM 106.DATABASE CONCEPTS COURSE OUTLINE 1.0 Introduction This introductory

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

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

Fundamentals of Database Systems, 4 th Edition By Ramez Elmasri and Shamkant Navathe. Table of Contents. A. Short Table of Contents

Fundamentals of Database Systems, 4 th Edition By Ramez Elmasri and Shamkant Navathe. Table of Contents. A. Short Table of Contents Fundamentals of Database Systems, 4 th Edition By Ramez Elmasri and Shamkant Navathe Table of Contents A. Short Table of Contents (This Includes part and chapter titles only) PART 1: INTRODUCTION AND CONCEPTUAL

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

An analysis of structural validity in entity-relationship modeling

An analysis of structural validity in entity-relationship modeling Data & Knowledge Engineering 47 (2003) 67 205 www.elsevier.com/locate/datak An analysis of structural validity in entity-relationship modeling James Dullea a, Il-Yeol Song b, *, Ioanna Lamprou b a The

More information

Chapter 5: Logical Database Design and the Relational Model Part 1: Transforming EER Diagrams into Relations Modern Database Management 6 th Edition

Chapter 5: Logical Database Design and the Relational Model Part 1: Transforming EER Diagrams into Relations Modern Database Management 6 th Edition Chapter 5: Logical Database Design and the Relational Model Part 1: into Relations Modern Database Management 6 th Edition Jeffrey A. Hoffer, Mary B. Prescott, Fred R. McFadden Robert C. Nickerson ISYS

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

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

Database Fundamentals: 1

Database Fundamentals: 1 Database Fundamentals Robert J. Robbins Johns Hopkins University rrobbins@gdb.org Database Fundamentals: 1 What is a Database? General: A database is any collection of related data. Restrictive: A database

More information

Databases and Information Management

Databases and Information Management Databases and Information Management Reading: Laudon & Laudon chapter 5 Additional Reading: Brien & Marakas chapter 3-4 COMP 5131 1 Outline Database Approach to Data Management Database Management Systems

More information

Foundations of Information Management

Foundations of Information Management Foundations of Information Management - WS 2009/10 Juniorprofessor Alexander Markowetz Bonn Aachen International Center for Information Technology (B-IT) Alexander Markowetz Born 1976 in Brussels, Belgium

More information

Ques 1. Define dbms and file management system? Ans- Database management system (DBMS) A file management system

Ques 1. Define dbms and file management system? Ans- Database management system (DBMS) A file management system UNIT-1 Ques 1. Define dbms and file management system? Ans- Database management system (DBMS) is a collection of interrelated data and a set of programs to access those data. Some of the very well known

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

Database Concepts. Database & Database Management System. Application examples. Application examples

Database Concepts. Database & Database Management System. Application examples. Application examples Database & Database Management System Database Concepts Database = A shared collection of logically related (and a description of this data), designed to meet the information needs of an organization.

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

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

n Assignment 4 n Due Thursday 2/19 n Business paper draft n Due Tuesday 2/24 n Database Assignment 2 posted n Due Thursday 2/26

n Assignment 4 n Due Thursday 2/19 n Business paper draft n Due Tuesday 2/24 n Database Assignment 2 posted n Due Thursday 2/26 Class Announcements TIM 50 - Business Information Systems Lecture 14 Instructor: John Musacchio UC Santa Cruz n Assignment 4 n Due Thursday 2/19 n Business paper draft n Due Tuesday 2/24 n Database Assignment

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

14 Databases. Source: Foundations of Computer Science Cengage Learning. Objectives After studying this chapter, the student should be able to:

14 Databases. Source: Foundations of Computer Science Cengage Learning. Objectives After studying this chapter, the student should be able to: 14 Databases 14.1 Source: Foundations of Computer Science Cengage Learning Objectives After studying this chapter, the student should be able to: Define a database and a database management system (DBMS)

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

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

Concepts of Database Management, Fifth Edition. Chapter 6: Database Design 2: Design Methodology

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

More information

Chapter 11. Entity-Relationship Modelling

Chapter 11. Entity-Relationship Modelling Chapter 11. Entity-Relationship Modelling Table of Contents Objectives... 1 Introduction... 1 Context... 2 Entities, Attributes and Values... 2 Entities... 2 Attributes... 3 Values... 3 Primary Key Data

More information

THE OPEN UNIVERSITY OF TANZANIA FACULTY OF SCIENCE TECHNOLOGY AND ENVIRONMENTAL STUDIES BACHELOR OF SIENCE IN INFORMATION AND COMMUNICATION TECHNOLOGY

THE OPEN UNIVERSITY OF TANZANIA FACULTY OF SCIENCE TECHNOLOGY AND ENVIRONMENTAL STUDIES BACHELOR OF SIENCE IN INFORMATION AND COMMUNICATION TECHNOLOGY THE OPEN UNIVERSITY OF TANZANIA FACULTY OF SCIENCE TECHNOLOGY AND ENVIRONMENTAL STUDIES BACHELOR OF SIENCE IN INFORMATION AND COMMUNICATION TECHNOLOGY OIT 217.DATABASE CONCEPTS AND DESIGN COURSE OUTLINE

More information

Chapter 2. Data Model. Database Systems: Design, Implementation, and Management, Sixth Edition, Rob and Coronel

Chapter 2. Data Model. Database Systems: Design, Implementation, and Management, Sixth Edition, Rob and Coronel Chapter 2 Data Model Database Systems: Design, Implementation, and Management, Sixth Edition, Rob and Coronel 1 In this chapter, you will learn: Why data models are important About the basic data-modeling

More information

CHAPTER 6 DATABASE MANAGEMENT SYSTEMS. Learning Objectives

CHAPTER 6 DATABASE MANAGEMENT SYSTEMS. Learning Objectives CHAPTER 6 DATABASE MANAGEMENT SYSTEMS Management Information Systems, 10 th edition, By Raymond McLeod, Jr. and George P. Schell 2007, Prentice Hall, Inc. 1 Learning Objectives Understand the hierarchy

More information

Module Contact: Dr. Beatriz de la Iglesia, CMP Copyright of the University of East Anglia Version 1

Module Contact: Dr. Beatriz de la Iglesia, CMP Copyright of the University of East Anglia Version 1 UNIVERSITY OF EAST ANGLIA School of Computing Sciences Main Series UG Examination 2012-13 DATABASE SYSTEMS CMPC2B08 Time allowed: 3 hours Answer THREE questions. All questions carry equal weight. Notes

More information

AS LEVEL Computer Application Databases

AS LEVEL Computer Application Databases AS LEVEL Computer Application Databases YLLSS In the syllabus, we have Applications of databases in society Students should be aware of the uses and applications of databases in everyday life (e.g. the

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

COURSE NAME: Database Management. TOPIC: Database Design LECTURE 3. The Database System Life Cycle (DBLC) The database life cycle contains six phases;

COURSE NAME: Database Management. TOPIC: Database Design LECTURE 3. The Database System Life Cycle (DBLC) The database life cycle contains six phases; COURSE NAME: Database Management TOPIC: Database Design LECTURE 3 The Database System Life Cycle (DBLC) The database life cycle contains six phases; 1 Database initial study. Analyze the company situation.

More information

Database Design Methodology

Database Design Methodology Topic 7 Database Design Methodology LEARNING OUTCOMES When you have completed this Topic you should be able to: 1. Discuss the purpose of a design methodology. 2. Explain three main phases of design methodology.

More information

TIM 50 - Business Information Systems

TIM 50 - Business Information Systems TIM 50 - Business Information Systems Lecture 15 UC Santa Cruz March 1, 2015 The Database Approach to Data Management Database: Collection of related files containing records on people, places, or things.

More information

Information Systems Analysis and Design CSC340. 2004 John Mylopoulos Database Design -- 2. Information Systems Analysis and Design CSC340

Information Systems Analysis and Design CSC340. 2004 John Mylopoulos Database Design -- 2. Information Systems Analysis and Design CSC340 XX. Database Design Databases Databases and DBMS Data Models, Hierarchical, Network, Relational Database Design Restructuring an ER schema Performance analysis Analysis of Redundancies, Removing generalizations

More information