Gourt > Computers > Programming > Languages > Perl > Database (1)
A database is an organized collection of data. The term originated within the computer industry, but its meaning has been broadened by popular use, to the extent that the European Database Directive (which creates intellectual property rights for databases) includes non-electronic databases within its definition. This article is confined to a more technical use of the term; though even amongst computing professionals, some attach a much wider meaning to the word than others.
One possible definition is that a database is a collection of records stored in a computer in a systematic way, so that a computer program can consult it to answer questions. For better retrieval and sorting, each record is usually organized as a set of data elements (facts). The items retrieved in answer to queries become information that can be used to make decisions. The computer program used to manage and query a database is known as a database management system (DBMS). The properties and design of database systems are included in the study of information science.
The central concept of a database is that of a collection of records, or pieces of knowledge. Typically, for a given database, there is a structural description of the type of facts held in that database: this description is known as a schema. The schema describes the objects that are represented in the database, and the relationships among them. There are a number of different ways of organizing a schema, that is, of modeling the database structure: these are known as database models (or data models). The model in most common use today is the relational model, which in layman's terms represents all information in the form of multiple related tables each consisting of rows and columns (the true definition uses mathematical terminology). This model represents relationships by the use of values common to more than one table. Other models such as the hierarchical model and the network model use a more explicit representation of relationships.
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Database :: Languages
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Investigations reveal that the 20-year-old, mainframe-based IT system has crashed several times in the last nine years and that the FAA has been planning its replacement for at least four years. But a new, next-generation IT system won't be on line until at least the end of 2008. Meanwhile, the old system creaks along on a wing and a prayer. - A major portion of the decades-old national air-traffic control system used to manage thousands of commercial and general aviation takeoffs and landings every day in the U.S. has crashed multiple times under the 20-year strain of its 24/7 operations. As a result, industry analysts and a numbe...
Toshiba Tecra A9: Powerful Computing Today and Tomorrow
Fri, 05 Sep 2008 15:15:57 -0400
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Toshiba Satellite Pro L300: Meeting Small Businesses Needs
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Phishing Cyber Gang Upgrades to Fast-Flux Botnet
Fri, 05 Sep 2008 15:00:39 -0400
According to researchers on the RSA FraudAction team, the Rock Phish gang has moved its infrastructure to the notorious Asprox botnet. Security researchers believe the move may precede an increase in phishing activity using the Asprox botnet. - Researchers at RSA, EMCs security division, believe the Rock Phish gang has upgraded its infrastructure to improve its ability to launch phishing attacks. According to the RSA FraudAction Research Lab, the Rock Phish group has moved its operations from its traditional botnet to the fast-flux infra...
IT3 with Eric Lundquist, Sept. 3, 2008
Fri, 05 Sep 2008 14:51:40 -0400
Software in standalone boxes, passwords and a belt full of personal devices will disappear over the next five years. In this episode of Three Things, Eric Lundquist explains why you will no longer buy standalone software from retail stores, why passwords are a poor substitute for security and geeks will no longer be identified by lots of devices hanging from a belt. - Video Content....
Douglas Crockford: 'I Want a Browser War!'
Fri, 05 Sep 2008 13:15:55 -0400
Douglas Crockford, a JavaScript architect at Yahoo and the man behind JSON, the JavaScript Object Notation, says he welcomes a browser war if it will bring innovation in the browser space and move the Web forward. Crockford says the browser war between Microsoft and Netscape moved the Web forward but introduced bugs into the network. However, this time standards and the marketplace will keep browser makers in line. Microsoft's complacency after winning the browser war opened the door for innovation by others such as Mozilla and now Google with its Chrome browser. - VIENNA, Va. Douglas Crockford, a JavaScript architect at Yahoo and founder of the JavaScript Object Notation, says he wants a browser war. Well, with Google's introduction of its Chrome browser Sept. 2 he just may have it. During a keynote at the Rich Web Experience conference here Sept. 4, Croc...
NYT > Technology
Digital Domain: How Many Reviewers Should Be in the Kitchen?
Sun, 07 Sep 2008 04:25:08 -0000
Web sites that welcome customer reviews have evolved significantly, producing work that increasingly approaches that of their professional forebears.
Unboxed: When Academia Puts Profit Ahead of Wonder
Sun, 07 Sep 2008 04:24:23 -0000
The University Small Business Patent Procedures Act is under increasing scrutiny by swelling ranks of critics, who charge that it has distorted the fundamental mission of universities.
Practical Traveler | iPhone E-Guides: Clueless in Cleveland? Use Your Thumb
Fri, 05 Sep 2008 19:36:35 -0000
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CNN.com - Technology
CIA, FBI embrace 'Facebook for spies'
Fri, 05 Sep 2008 20:08:59 -0400
When you see people at the office using such Internet sites as Facebook, you might suspect those workers are slacking off. But that's not the case at U.S. intelligence agencies, where bosses are encouraging their staffs to use a new social-networking site designed for the secret world of spying.
Asia pollution may boost U.S. temperatures
Fri, 05 Sep 2008 12:55:23 -0400
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Thu, 04 Sep 2008 10:01:58 -0400
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NPR Topics: Technology
Particle Accelerator Helps Test Wine
Sat, 06 Sep 2008 10:53:00 -0400
Stephen Williams of the Antique Wine Company describes the new high-tech way to determine a wine's vintage.
Voting Technology Evolves In Electronic World
Fri, 05 Sep 2008 10:00:00 -0400
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Google Launches 'Chrome' Web Browser
Fri, 05 Sep 2008 10:00:00 -0400
Internet search giant Google unveiled Chrome, a new piece of Web browser software on Tuesday. Danny Sullivan, editor-in-chief of SearchEngineLand.com, explains what Google's open-source browser can do, and why a search engine leader wants to get into the Web software market.
BBC News | Technology | UK Edition
One Laptop signs up with Amazon
Fri, 05 Sep 2008 09:23:44 -0000
Online retailer Amazon will help the One Laptop Per Child organisation with its plans to sell its XO laptop in the US.
Chaos at £20,000 petrol giveaway
Fri, 05 Sep 2008 12:17:46 -0000
There are reports of chaos at a petrol station which gave away £20,000 of petrol to promote a video game.
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Europe's space freighter undocks from the International Space Station after completing its mission to the orbiting platform.
Reuters Video: Technology
Reuters Technology Week
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Sony Reader launches in UK
Thu, 04 Sep 2008 12:59:51 -0400
Sep 4 - The Japanese electronics company is getting some help from Britain's biggest book chain for the UK launch of its electronic book.
AP Top Technology News At 1:23 a.m. EDT
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By RACHEL METZ Fri, 05 Sep 2008 18:47:01 -0000
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CNET News.com
Google-focused satellite enters orbit
Sat, 06 Sep 2008 19:33:22 -0700
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In NFL deal, an extra point for Adobe's Flash
Sat, 06 Sep 2008 18:40:09 -0700
Football fans will get to see live streaming of NBC's Sunday night games via Flash--not NBC's Olympic teammate, Silverlight.
Chris Shipley 1, Internet lynch mob 0
Sat, 06 Sep 2008 17:51:00 -0700
Demo's impresario goes public with a tart and smartly written riposte to the shoot-from-the-lip crowd.
CGI Database Applications with Perl - Tutorial covering the strategies and technologies behind writing a database-driven CGI application.
Dabbling in Live Databases: Microsoft Access - This tutorial covers the issue of connecting a Microsoft Access database to your website using Perl.
Meta Description: [ Many words have been written about databases and Web sites, and these are some more--but with a twist, because we cover what you need to know. Databases can be a complex and hairy subject, with a vocabulary seemingly all their own. The good news is that a lot of database hoo-hah is verbal smoke-a... ]
DBD::ODBC Tutorial Part 1 - Explains how to use drivers, data sources and make connections.
Meta Description: [ This tutorial describes the ODBC data sources that let you access your databases and shows you how to connect to a database from a Perl script. ]
DBI - The Perl Database Interface - Official site includes documentation, mailing list information, and demonstrations.
DBI Examples - Tips and discussion on basic DBI usage and optimizing DBI programs.
dbi-users@perl.org - Archive of the mailing list.
Enabling ODBC support in Perl with Perl DBI and DBD::ODBC - How to build Perl DBI, add the DBD::ODBC module and use an ODBC driver in Perl scripts.
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Introduction to MySQL (using Perl DBI) - 4 page article starts with basics of MySQL and finishes up with actual examples of DBI in a MySQL context.
Meta Description: [ danchan is a weblog with the best daily news on the net, high gear cool equipment reviews, tips on backpacking in central europe, cgi/perl/mysql tutorials and a free weblogging service with no ads. ]
Just Enough DBI to be Dangerous - Slides and sample code from a talk given by Bradford Powell at a Raleigh Perl Mongers meeting.
Michael Peppler's Home Page - Sybperl (the Sybase OpenClient extensions to Perl) and DBD::Sybase information
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The Fine Art of Database Programming - An outline of database programming, with particular emphasis on Perl.
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