MIS DATABASE SYSTEMS, DATA WAREHOUSES, AND DATA MARTS CHAPTER 3

Slides:



Advertisements
Similar presentations
C6 Databases.
Advertisements

Database Management3-1 L3 Database Management Santa R. Susarapu Ph.D. Student Virginia Commonwealth University.
Lecture-7/ T. Nouf Almujally
The database approach to data management provides significant advantages over the traditional file-based approach Define general data management concepts.
Management Information Systems, Sixth Edition
MIS DATABASE SYSTEMS, DATA WAREHOUSES, AND DATA MARTS MBNA
Database and Data Warehouse
Chapter 3 Database Management
The Hierarchy of Data Bit (a binary digit): a circuit that is either on or off Byte: 8 bits Character: each byte represents a character; the basic building.
Your Interactive Guide to the Digital World Discovering Computers 2012 Chapter 10 Managing a Database.
Database Management: Getting Data Together Chapter 14.
McGraw-Hill © 2008 The McGraw-Hill Companies, Inc. All rights reserved. Chapter 3 Building Business Intelligence Chapter 3 DATABASES AND DATA WAREHOUSES.
McGraw-Hill/Irwin Copyright © 2008, The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill/Irwin Copyright © 2008 The McGraw-Hill Companies, Inc.
Living in a Digital World Discovering Computers 2010.
Mgt 20600: IT Management & Applications Databases
Chapter 4: Database Management. Databases Before the Use of Computers Data kept in books, ledgers, card files, folders, and file cabinets Long response.
MIS DATABASE SYSTEMS, DATA WAREHOUSES, AND DATA MARTS CHAPTER 3
Introduction to Database Management
CHAPTER 3 DATABASES AND DATA WAREHOUSES. 3-2 STUDENT LEARNING OUTCOMES 1.Describe business intelligence and its role 2.Compare databases and data warehouses.
BUSINESS DRIVEN TECHNOLOGY
Lead Black Slide. © 2001 Business & Information Systems 2/e2 Chapter 7 Information System Data Management.
Professor Michael J. Losacco CIS 1150 – Introduction to Computer Information Systems Databases Chapter 11.
Chapter 4 Relational Databases Copyright © 2012 Pearson Education 4-1.
XP Information Information is everywhere in an organization Employees must be able to obtain and analyze the many different levels, formats, and granularities.
MIS DATABASE SYSTEMS, DATA WAREHOUSES, AND DATA MARTS MBNA ebay
Fundamentals of Information Systems, Third Edition2 Principles and Learning Objectives The database approach to data management provides significant advantages.
5.1 © 2007 by Prentice Hall 5 Chapter Foundations of Business Intelligence: Databases and Information Management.
Intro to MIS – MGS351 Databases and Data Warehouses Chapter 3.
Chapter 5 Lecture 2. Principles of Information Systems2 Objectives Understand Data definition language (DDL) and data dictionary Learn about popular DBMSs.
Discovering Computers Fundamentals, 2012 Edition Your Interactive Guide to the Digital World.
Copyright ©2016 Cengage Learning. All Rights Reserved
6-1 DATABASE FUNDAMENTALS Information is everywhere in an organization Information is stored in databases –Database – maintains information about various.
Copyright © 2003 by Prentice Hall Computers: Tools for an Information Age Chapter 13 Database Management Systems: Getting Data Together.
© Paradigm Publishing Inc. 9-1 Chapter 9 Database and Information Management.
Objectives Overview Define the term, database, and explain how a database interacts with data and information Define the term, data integrity, and describe.
The McGraw-Hill Companies, Inc Information Technology & Management Thompson Cats-Baril Chapter 3 Content Management.
Fundamentals of Information Systems, Fifth Edition
STORING ORGANIZATIONAL INFORMATION— DATABASES CIS 429—Chapter 7.
Management Information Systems By Effy Oz & Andy Jones
Organizing Data and Information AD660 – Databases, Security, and Web Technologies Marcus Goncalves Spring 2013.
Chapter 7: Database Systems Succeeding with Technology: Second Edition.
McGraw-Hill/Irwin Copyright © 2013 by The McGraw-Hill Companies, Inc. All rights reserved. Chapter 3 Databases and Data Warehouses: Supporting the Analytics-Driven.
CHAPTER 8: MANAGING DATA RESOURCES. File Organization Terms Field: group of characters that represent something Record: group of related fields File:
Discovering Computers Fundamentals Fifth Edition Chapter 9 Database Management.
Professor Michael J. Losacco CIS 1110 – Using Computers Database Management Chapter 9.
Objectives Overview Define the term, database, and explain how a database interacts with data and information Describe the qualities of valuable information.
Lead Black Slide Powered by DeSiaMore1. 2 Chapter 7 Information System Data Management.
Storing Organizational Information - Databases
C6 Databases. 2 Traditional file environment Data Redundancy and Inconsistency: –Data redundancy: The presence of duplicate data in multiple data files.
5-1 McGraw-Hill/Irwin Copyright © 2007 by The McGraw-Hill Companies, Inc. All rights reserved.
5 - 1 Copyright © 2006, The McGraw-Hill Companies, Inc. All rights reserved.
McGraw-Hill/Irwin © 2008 The McGraw-Hill Companies, All Rights Reserved Chapter 7 Storing Organizational Information - Databases.
CHAPTER 3 DATABASES AND DATA WAREHOUSES. 2 OPENING CASE STUDY Chrysler Spins a Competitive Advantage with Supply Chain Management Software Chapter 2 –
6.1 © 2010 by Prentice Hall 6 Chapter Foundations of Business Intelligence: Databases and Information Management.
MANAGING DATA RESOURCES ~ pertemuan 7 ~ Oleh: Ir. Abdul Hayat, MTI.
Data resource management
Chapter 3 Databases and Data Warehouses: Building Business Intelligence Copyright © 2010 by the McGraw-Hill Companies, Inc. All rights reserved. McGraw-Hill/Irwin.
Management Information Systems, 4 th Edition 1 Chapter 8 Data and Knowledge Management.
DATA RESOURCE MANAGEMENT
1 Chapter 9 Database Management. Objectives Overview Define the term, database, and explain how a database interacts with data and information Describe.
© 2003 Prentice Hall, Inc.3-1 Chapter 3 Database Management Information Systems Today Leonard Jessup and Joseph Valacich.
Fundamentals of Information Systems, Sixth Edition Chapter 3 Database Systems, Data Centers, and Business Intelligence.
1 Management Information Systems M Agung Ali Fikri, SE. MM.
Data Resource Management Chapter 5 McGraw-Hill/IrwinCopyright © 2011 by The McGraw-Hill Companies, Inc. All rights reserved.
McGraw-Hill/Irwin ©2008,The McGraw-Hill Companies, All Rights Reserved Chapter 5 Data Resource Management.
Management Information Systems by Prof. Park Kyung-Hye Chapter 7 (8th Week) Databases and Data Warehouses 07.
Fundamentals & Ethics of Information Systems IS 201
MANAGING DATA RESOURCES
Chapter 1 Database Systems
Chapter 3 Database Management
Presentation transcript:

MIS DATABASE SYSTEMS, DATA WAREHOUSES, AND DATA MARTS CHAPTER 3 Hossein BIDGOLI

Chapter 3 Database Systems, Data Warehouses, and Data Marts l e a r n i n g o u t c o m e s LO1 Define a database and a database management system. LO2 Explain logical database design and the relational database model. LO3 Define the components of a database management system. LO4 Summarize recent trends in database design and use. LO5 Explain the components and functions of a data warehouse.

l e a r n i n g o u t c o m e s (cont’d.) Chapter 3 Database Systems, Data Warehouses, and Data Marts l e a r n i n g o u t c o m e s (cont’d.) LO6 Describe the functions of a data mart. LO7 Define business analytics, and describe its role in the decision-making process.

Databases Database File Record Data hierarchy Collection of related data that can be stored in a central location or in multiple locations Usually a group of files File Group of related records All files are integrated Record Group of related fields Data hierarchy

Exhibit 3.1 Data Hierarchy

Databases (cont’d.) Critical component of information systems Any type of analysis that’s done is based on data available in the database Database management system (DBMS) Creating, storing, maintaining, and accessing database files Advantages over a flat file system

Exhibit 3.2 Interaction between the user, DBMC, and Database

Types of Data in a Database Internal data Collected within organization External data Sources

Methods for Accessing Files Sequential file structure Records organized and processed in numerical or sequential order Organized based on a “primary key” Usually used for backup and archive files Because they need updating only rarely Random access file structure Records can be accessed in any order Fast and very effective when a small number of records needs to be processed daily or weekly

Methods for Accessing Files (cont’d.) Indexed sequential access method (ISAM) Records accessed sequentially or randomly Depending on the number being accessed Indexed access Uses an index structure with two parts: Indexed value Pointer to the disk location of the record matching the indexed value

Logical Database Design Physical view How data is stored on and retrieved from storage media Logical view How information appears to users How it can be organized and retrieved Can be more than one logical view

Logical Database Design (cont’d.) Data model Determines how data is created, represented, organized, and maintained Includes Data structure Operations Integrity rules Hierarchical model Relationships between records form a treelike structure

Exhibit 3.3 A Hierarchical Model

Logical Database Design (cont’d.) Network model Similar to the hierarchical model Records are organized differently

Exhibit 3.4 A Network Model

The Relational Model Relational model Data dictionary Uses a two-dimensional table of rows and columns of data Data dictionary Field name Field data type Default value Validation rule

The Relational Model (cont’d.) Primary key Unique identifier Foreign key Establishes relationships among tables Normalization Improves database efficiency Eliminates redundant data 1NF through 3NF (or 5NF)

The Relational Model (cont’d.) Data retrieval Select Project Join Intersection Union Difference

Components of a DBMS Database engine Data definition Data manipulation Application generation Data administration

Database Engine Heart of DBMS software Responsible for data storage, manipulation, and retrieval Converts logical requests from users into their physical equivalents

Data Definition Create and maintain the data dictionary Define the structure of files in a database Changes to a database’s structure Adding fields Deleting fields Changing field size Changing data type

Data Manipulation Add, delete, modify, and retrieve records from a database Query language Structured Query Language (SQL) Standard fourth-generation query language used by many DBMS packages SELECT statement Query by example (QBE) Construct statement of query forms Graphical interface

Application Generation Design elements of an application using a database Data entry screens Interactive menus Interfaces with other programming languages

Data Administration Used for: Create, read, update, and delete (CRUD) Backup and recovery Security Change management Create, read, update, and delete (CRUD) Database administrator (DBA) Individual or department Responsibilities

Recent Trends in Database Design and Use Data-driven Web sites Natural language processing Distributed databases Object-oriented databases

Data-Driven Web Sites Data-driven Web site Interface to a database Retrieves data and allows users to enter data Improves access to information Useful for: E-commerce sites that need frequent updates News sites that need regular updating of content Forums and discussion groups Subscription services, such as newsletters

Distributed Databases Data is stored on multiple servers placed throughout an organization Reasons for choosing Approaches for setup Fragmentation Replication Allocation Security issues

Object-Oriented Databases Object consists of attributes and methods Encapsulation Grouping objects along with their attributes and methods into a class Inheritance New objects can be created faster and more easily by entering new data in attributes Interaction with an object-oriented database takes places via methods

Data Warehouses Data warehouse Multidimensional data Characteristics Collection of data used to support decision-making applications and generate business intelligence Multidimensional data Characteristics Subject oriented Integrated Time variant Type of data Purpose

Data Warehouse Applications at InterContinental Hotels Group (IHG) IHG operates 4,000+ hotels in the world Migrated from entry-level data mart to an enterprise data warehouse (EDW) Chose Teradata Data Warehouse Increased the company’s query response time from hours to minutes

Exhibit 3.6 A Data Warehouse Configuration

Input Variety of sources External Databases Transaction files ERP systems CRM systems

ETL Extraction, transformation, and loading (ETL) Extraction Collecting data from a variety of sources Converting data into a format that can be used in transformation processing Transformation processing Make sure data meets the data warehouse’s needs Loading Process of transferring data to the data warehouse

Storage Raw data Summary data Metadata

Output Data warehouse supports different types of analysis Generates reports for decision making Online analytical processing (OLAP) Generates business intelligence Uses multiple sources of information and provides multidimensional analysis Hypercube Drill down and drill up

Exhibit 3.7 Slicing and Dicing Data

Output (cont’d.) Data-mining analysis Reports Discover patterns and relationships Reports Cross-reference segments of an organization’s operations for comparison purposes Find patterns and trends that can’t be found with databases Analyze large amounts of historical data quickly Assist management in making well-informed business decisions

Data Marts Data mart Advantages over data warehouses Smaller version of data warehouse Used by single department or function Advantages over data warehouses More limited scope than data warehouses

Business Analytics Business analytics (BA) Uses data and statistical methods to gain insight into the data Provide decision makers with information to act on More forward looking than BI Several types of BA methods Descriptive and predictive analytics Major providers of business analytics software SAS, IBM, SAP, Microsoft, and Oracle

Summary Databases Data warehouses, data marts, and business analytics Accessing files Design principles Components Recent trends Data warehouses, data marts, and business analytics