succeeding with technology chapter 7
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ITE 115SWTTRANSCRIPT
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Succeeding with Technology 4th ed > Database Systems >
Please discontinue use of cell phoneand turn off the ringer.
Basic Data Management Concepts Organizing Data in a Database Database Management Systems Using Database Systems in
Organizations Database Trends Managing Databases
Database Systems
Chapter 7
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Succeeding with Technology 4th ed > Database Systems >
The Value of Databases Databases are a key ingredient of
today’s most popular Internet services, and the backbone of our information-driven economy.
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Succeeding with Technology 4th ed > Database Systems >
Key Terms DBMS Field Record File Primary Key
Basic Data Management Concepts
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Succeeding with Technology 4th ed > Database Systems >
Database Management System (DBMS)
A DBMS consists of a group of programs that manipulate the database and provide an interface between the database and the user or the database and application programs.
Front End
Back End
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Succeeding with Technology 4th ed > Database Systems >
Database A collection of data organized to meet user’s
needs.
Field
Record
File or Table
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Succeeding with Technology 4th ed > Database Systems >
Database Fields
Fields are set to hold specific types of data.
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Succeeding with Technology 4th ed > Database Systems >
Database Hierarchy
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Succeeding with Technology 4th ed > Database Systems >
Keys and Primary Key Key: A field in a record
that is used to identify the record
Primary key: A field that uniquely identifies a recordA primary key field
prevents duplicate records from occurring in a table.
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Succeeding with Technology 4th ed > Database Systems >
Primary Keys
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Succeeding with Technology 4th ed > Database Systems >
Simple but Restrictive DBMS
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Succeeding with Technology 4th ed > Database Systems >
The Database Approach to Data Management
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Succeeding with Technology 4th ed > Database Systems >
Key TermsRelational ModelData Analysis
Organizing Data in a Database
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Succeeding with Technology 4th ed > Database Systems >
The Relational Model In a relational database, tables are linked
(related) through common fields.
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Succeeding with Technology 4th ed > Database Systems >
Relation Types One-to-many
Most typical Makes use of primary key
One-to-one Many-to-many
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Succeeding with Technology 4th ed > Database Systems >
Data Analysis
Data analysis is a process that involves evaluating data to identify problems with the content of a database.Consider what would happen if
CardNumber were not a primary key, and two or more customers had the same CardNumber.
Data Integrity refers to the accuracy of the data in a database.
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Succeeding with Technology 4th ed > Database Systems >
Key TermsData IntegrityGIGOSchemaData DictionarySQL
Database Management Systems
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Succeeding with Technology 4th ed > Database Systems >
Database Types
Flat File
Single User
Multiuser
General-Purpose
Special-Purpose
Open-Source
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Succeeding with Technology 4th ed > Database Systems >
Single User
Only one person can use the database at any time.
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Succeeding with Technology 4th ed > Database Systems >
Multiuser
The U.S. federal government has developed a Web-based DBMS that provides access to 100,000 federal data sources to U.S. citizens.
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Succeeding with Technology 4th ed > Database Systems >
General & Special Purpose
General purpose can be used for large number of applications. Oracle is currently the market leader.
Special purpose is designed for one purpose or a limited number of applications.
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Succeeding with Technology 4th ed > Database Systems >
Open-Source Database Systems
Open source DBMS offer the same advantages as all open-source software: there is strong community support, they are completely customizable, and they are free.
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Succeeding with Technology 4th ed > Database Systems >
Database Tables Database tables can contain a few
or millions of records and fields.
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Succeeding with Technology 4th ed > Database Systems >
Input and Output Interface Designs Designing effective interfaces is a convenient and
powerful database design feature in most database management systems.
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Succeeding with Technology 4th ed > Database Systems >
Data Accuracy and Integrity Data accuracy means that data stored in the
database is accurate and up to date.
GIGO, or Garbage In Garbage Out, refers to the fact that inaccurate data
entered in a database will result in inaccurate information produced from
the database.
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Succeeding with Technology 4th ed > Database Systems >
Creating a Database
A data dictionary provides a detailed description of all data used in the database.
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Succeeding with Technology 4th ed > Database Systems >
Key Terms Data Warehouse Data Mining
Using Database Systems in Organizations
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Succeeding with Technology 4th ed > Database Systems >
Information and Decision Support Database
systems are a valuable tool for producing information that supports decision making for people and organizations.
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Succeeding with Technology 4th ed > Database Systems >
Data Stores Data Warehouse: A database that holds
important information from a variety of sources.
Data Mart: A small data warehouse, often developed for a specific person or purpose.
Data Mining: the process of extracting information from a data warehouse.“Connecting the dots”
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Succeeding with Technology 4th ed > Database Systems >
Business Intelligence
Business Intelligence is the use of data mining to help increase efficiency, reduce costs, or increase profits.
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Succeeding with Technology 4th ed > Database Systems >
Key Terms Distributed Database
Database Trends
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Succeeding with Technology 4th ed > Database Systems >
Databases and the Internet A number of trends in
the development and use of databases and database management systems will meet these changing needs.
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Succeeding with Technology 4th ed > Database Systems >
Distributed Database
With a distributed database, also called a virtualized database, the actual data may be spread across several databases at different locations.
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Succeeding with Technology 4th ed > Database Systems >
Database Systems, the Internet and Networks
This online shopping site uses the Web as the front end to a database of thousands of products and reviews.
The back-end database is invisible and behind the scenes.
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Succeeding with Technology 4th ed > Database Systems >
Key Terms Database Administrator
Managing Databases
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Succeeding with Technology 4th ed > Database Systems >
Database Administrator
A database administrator (DBA) is a skilled and trained computer professional who directs all activities related to an organization’s database, including providing security from intruders.
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Succeeding with Technology 4th ed > Database Systems >
Chapter 7 Questions?