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Lossless Decomposition& 4NF

Lossless Decomposition& 4NF

CS157B Lecture 16. Lossless Decomposition& 4NF. Prof. Sin-Min Lee Department of Computer Science. 1. Closure. Given a set of functional dependencies, F, its closure, F + , is all FDs that are implied by FDs in F. e.g. If A ? B, and B ? C, then clearly A ? C.

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987 views • 70 slides
Exam 2 Review

Exam 2 Review

Exam 2 Review. Dr. Bernard Chen Ph.D. University of Central Arkansas. Relational Model Concepts. The relational model represents the database as a collection of relations Each relation resembles a table of values

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716 views • 63 slides
Chapter 10 Designing Databases

Chapter 10 Designing Databases

Chapter 10 Designing Databases. Learning Objectives. Explain the role of designing databases in the analysis and design of an information system.

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594 views • 59 slides
Chapter 10 Designing Databases

Chapter 10 Designing Databases

Modern Systems Analysis and Design Fourth Edition Jeffrey A. Hoffer Joey F. George Joseph S. Valacich. Chapter 10 Designing Databases. Learning Objectives. Define key database design terms. Explain the role of database design in the IS development process.

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1.16k views • 55 slides
NORMALIZATION

NORMALIZATION

NORMALIZATION. Normalization. Normalization is process of removing all redundancy form database. It is the application of a set of simple rules called first, second & third normal form. When database design is fully normalized ,there is no repletion of data across tables

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970 views • 55 slides
LECTURE 3 THE RELATIONAL DATABASE MODEL

LECTURE 3 THE RELATIONAL DATABASE MODEL

LECTURE 3 THE RELATIONAL DATABASE MODEL. Origins of the Relational Data Model. It was developed by E.F. Codd in the early 1970s Commercial systems based on the relational model appeared in the late 1970s

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588 views • 48 slides
LECTURE 3 THE RELATIONAL DATABASE MODEL

LECTURE 3 THE RELATIONAL DATABASE MODEL

LECTURE 3 THE RELATIONAL DATABASE MODEL. Origins of the Relational Data Model. It was developed by E.F. Codd in the early 1970s Commercial systems based on the relational model appeared in the late 1970s

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487 views • 48 slides
Chapter 8

Chapter 8

Chapter 8. Mapping a Conceptual Design into a Logical Design. Chapter 8 Outline. Conceptual Database Design Relational Database Design Using ER-to-Relational Mapping Mapping EER Model Constructs to Relations. What is a design methodology?.

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456 views • 45 slides
Basic Definitions Relational Database Concepts Relational Database Management Systems

Basic Definitions Relational Database Concepts Relational Database Management Systems

Oracle Programming Week 1 Review on the Relational Data Model. Basic Definitions Relational Database Concepts Relational Database Management Systems. Chapter 5 Elmasri & Navathe book. User2. User1. Database. User4. User3. Basic Definitions.

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651 views • 43 slides
Chapter 4

Chapter 4

Chapter 4. The REA Enterprise Ontology: Business Process Level Modeling. Acknowledgement: Many of the slides for this chapter are adapted from class materials prepared by Professor William E. McCarthy at Michigan State University. Chapter Learning Objectives.

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555 views • 40 slides
Chapter 4

Chapter 4

Chapter 4. The REA Enterprise Ontology: Business Process Level Modeling. Acknowledgement: Many of the slides for this chapter are adapted from class materials prepared by Professor William E. McCarthy at Michigan State University. Chapter Learning Objectives.

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408 views • 40 slides
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Normalization. ?????????????????????????????????????????????? ??????????????????????????????????????? ????????????????????? Normalization.

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373 views • 37 slides
Object-Relational Modeling

Object-Relational Modeling

Object-Relational Modeling. What Is a Relational Data Model?. Based on the concept of relations (tables of data) Relationships established by matching primary and foreign keys Relational DBMSs (RDBMS) are the most commonly used in industry today.

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446 views • 32 slides
Chapter 9 Relational Database Design by ER- and EER-to-Relational Mapping

Chapter 9 Relational Database Design by ER- and EER-to-Relational Mapping

Chapter 9 Relational Database Design by ER- and EER-to-Relational Mapping. Relational Database Design by ER- and EER-to-Relational Mapping. Design a relational database schema Based on a conceptual schema design Seven-step algorithm to convert the basic ER model constructs into relations

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600 views • 26 slides
Relational Model (CB Chapter 4)

Relational Model (CB Chapter 4)

Relational Model (CB Chapter 4). CPSC 356 Database Ellen Walker Hiram College. Relational Model. Proposed by E.F. Codd, 1970 Goals Data independence (physical vs. conceptual) Normalization (avoiding redundancy) Set-oriented data manipulation language (relational algebra)

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225 views • 22 slides
Week 6 Normalisation

Week 6 Normalisation

Week 6 Normalisation. Database Normalization. ? Proposed by Codd (1972) ? Introduced 3 normal forms, the first, second and third normal form ? A stronger definition of 3NF - called Boyce-Codd normal form (CDNF) was proposed later ? Later, 4NF and 5NF were proposed

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306 views • 18 slides
Microsoft Access

Microsoft Access

Microsoft Access. CS 110 Fall 2005. Entity Relationship Model. Entities Principal data object about which information is to be collected employees, projects, invoices, etc. Relationships An association between two or more entities employees are assigned to projects. Entities.

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276 views • 16 slides

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