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Normalizing Your Database and Why you WANT to do it!

Normalizing Your Database and Why you WANT to do it!

INFYS540 Normalizing Your Database and Why you WANT to do it! Lesson 7 Chapter 5 Appendix Data Redundancy Problems Redundancy breeds errors Same data defined in multiple places is BAD Spelling/typographical error prone Lack of data integrity Inability to perform simple queries

By Anita
(302 views)

MS SQL Sever 2005

MS SQL Sever 2005

MS SQL Sever 2005. SQL Sever Management Studio Express. Introduction. Installation At home With software package Without Login in Building Database At home Working with SQL Differences Notes Other resources . Installation .

By Gideon
(674 views)

제 10 장

제 10 장

제 10 장. 차원 모델링의 원리. 장의 목표. 요구사항의 규정이 데이터 설계를 결정하는 방법 차원 모델링과 개체 - 관계 모델링 비교 STAR schema 사실 테이블과 차원 테이블의 내부 비교 데이터 웨어하우스를 위한 STAR 스키마의 장점. 10.1 요구사항에서부터 데이터 설계까지 . 요구사항의 규정은 데이터 웨어하우스를 위한 데이터 설계에 이용된다 . 데이터 설계는 자료 구조들을 조립하는 것 한 그룹의 데이터 요소들은 하나의 자료 구조를 형성한다 .

By Patman
(258 views)

CHAPTER 4

CHAPTER 4

CHAPTER 4. DATABASES AND DATA WAREHOUSES A Gold Mine of Information. 4-2. Introduction. Today, Organizations Need. Information to compete effectively Information just to stay alive in the information age Information organized in such a way that you can easily and quickly get to it

By Gideon
(264 views)

A Very Brief Introduction to Relational Databases

A Very Brief Introduction to Relational Databases

A Very Brief Introduction to Relational Databases. Chuck Cusack Spring 2004. Course Roster File #1. Consider an instructor who wishes to store a list of his courses and students enrolled in those courses. Below is how he might store the information in a file

By betty_james
(241 views)

Project and Data Management Software

Project and Data Management Software

Project and Data Management Software. Data Analysis and Data Modelling Normalisation. Normalisation. Normalisation provides an algorithm for reducing complex data structures into simple structures Formalised by set of rules known as Codd’s laws

By Anita
(293 views)

Chapter 5 Normalization of Database Tables

Chapter 5 Normalization of Database Tables

Chapter 5 Normalization of Database Tables. Database Tables and Normalization. Normalization is a process for assigning attributes to entities. It reduces data redundancies and helps eliminate the data anomalies. Normalization works through a series of stages called normal forms:

By Rita
(372 views)

Database Normalization

Database Normalization

Database Normalization. MIS 520 – Database Theory Fall 2001 (Day) Lecture 4/5/6. Definition. This is the process which allows you to winnow out redundant data within your database. This involves restructuring the tables to successively meeting higher forms of Normalization.

By jana
(527 views)

Data Models Example: A relation is a table.

Data Models Example: A relation is a table.

Attributes (column headers). Attributes (column headers). Tuples (rows). Tuples (rows). Data Models Example: A relation is a table. name manf Winterbrew Pete’s Bud Lite Anheuser-Busch Beers. Relation name. Relation name. Schemas versus Instances.

By lexiss
(356 views)

Chapter 25 Relational Databases

Chapter 25 Relational Databases

Chapter 25 Relational Databases. Chapter Goals. To understand how relational databases store information To learn how to query a database with the Structured Query Language (SQL) To connect to databases with Java Database Connectivity (JDBC)

By avery
(246 views)

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.

By moses
(467 views)

Ch 6: ER to Relational Mapping

Ch 6: ER to Relational Mapping

Ch 6: ER to Relational Mapping. Much of the material presented in these slides was developed by Dr. Ramon Lawrence at the University of Iowa. ER Model to Relational Schemas. These notes will describe how to convert an ER diagram into a corresponding relational schema.

By tamar
(469 views)

Chapter 6 Database Design

Chapter 6 Database Design

Chapter 6 Database Design. Database Systems: Design, Implementation, and Management 4th Edition Peter Rob & Carlos Coronel. Changing Data into Information. Data are the raw facts that are stored in databases. Raw facts are seldom immediately useful to a decision maker.

By barr
(523 views)

INLS 623– Database Systems II

INLS 623– Database Systems II

INLS 623– Database Systems II. Instructor: Dr. Carter. Database Management System. Database: Logically Coherent Collection of related data. Types of Database Systems. Relational Graph Object-oriented. Relational Database Systems in Wide Use.

By dino
(159 views)

Lecture 6: Query Processing; Hurry up!

Lecture 6: Query Processing; Hurry up!

Lecture 6: Query Processing; Hurry up!. Join Algorithms (ctd.) Sort-Merge External Sorting Costs and Complexities Mechanics Parsing Optimization. Overview EXPLAIN Measuring Performance Disk Architectures Indexes Motivation, Definition, Demonstration Classification

By rowdy
(220 views)

Chapter (9) ER and EER-to-Relational Mapping, and other Relational Languages Objectives

Chapter (9) ER and EER-to-Relational Mapping, and other Relational Languages Objectives

Chapter (9) ER and EER-to-Relational Mapping, and other Relational Languages Objectives How a relational database schema can be created from a conceptual schema developed using the ER models.

By dinh
(473 views)

Chapter 14 & 15 Conceptual & Logical Database Design Methodology

Chapter 14 & 15 Conceptual & Logical Database Design Methodology

Chapter 14 & 15 Conceptual & Logical Database Design Methodology. Definition Conceptual database design Relational database - logical design Relational database - physical design Relational database - operation Example. Definition. Design methodology

By iram
(385 views)

Systems for Business Enterprises Introduction

Systems for Business Enterprises Introduction

Systems for Business Enterprises Introduction. 2019. By PhD. Samia Chehbi Gamoura Associate Professor – EM Strasbourg France. Agenda. What is ‘Information System’ ?! 5min to answer…. Information System  Introductive Example. We want to manage customers in autonomous way

By deon
(129 views)

Chapter 12: Designing Databases

Chapter 12: Designing Databases

12. Chapter 12: Designing Databases. Systems Analysis and Design in a Changing World, Fourth Edition. Learning Objectives. Describe the differences and similarities between relational and object-oriented database management systems

By cale
(229 views)

Database Design: The Quick and Easy Way (Well, Mostly)

Database Design: The Quick and Easy Way (Well, Mostly)

Mac Newbold mac@macnewbold.com www.codegreene.com UPHPU, November 17, 2006. Database Design: The Quick and Easy Way (Well, Mostly). Why Do We Care?. The database is the core of a web application Almost everything depends on it

By ulric
(177 views)

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