Tugas PK BAB 7

TUGAS PENGENALAN KOMPUTER BAB 7

++The Google Guys Search for Success

ü  Google is one of the most successful companies on WWW.

Ø  Search for Web pages, facts, quotes, etc.

Ø  200 million queries a day

ü  Launched by a Sergey Brin and
Larry Page (Stanford Ph.D. students)

Ø  New approach in search technology

Ø  Marks a page’s relevance by the number of times other related web pages link to it, not how often a word or phrase appeared on a page

ü  Google is one of the most successful companies on WWW.

Ø  Search for Web pages, facts, quotes, etc.

Ø  200 million queries a day

ü  Launched by a Sergey Brin and
Larry Page (Stanford Ph.D. students)

Ø  New approach in search technology

Ø  Marks a page’s relevance by the number of times other related web pages link to it, not how often a word or phrase appeared on a page

++DATABASE

What Good Is a Database?

ü  A database:

Ø  A collection of information
stored on computer disks

ü  Database software:

Ø  Application software
(like word processing and
spreadsheet software)

Ø  Designed to maintain databases
(collections of information)

               

The Electronic File Cabinet: Database Basics

ü  Advantages offered by computerized databases:

Ø  Make it easier to store large quantities of information

Ø  Make it easier to retrieve information quickly and flexibly

Ø  Make it easy to organize and reorganize information

Ø  Make it easy to print and distribute information in a variety of ways

Database Anatomy

ü  Database program: a software tool for organizing the storage and retrieval of information

ü  Database: a collection of information stored in an organized form in a computer

Ø  Typically composed of one or more tables

q  A collection of related information

q  A collection of records

               

Database Operations

ü  Import: receive data in the form of text files

ü  Browse: navigate through information

ü  Query: find records that match specific criteria

               

++Database Management Systems

From File Managers to Database Management Systems

ü  File manager: enables users to work with one file at a time

ü  Database management system (DBMS): manipulates data in a large collection of files, cross-referencing between files as needed

Database Trends

ü  Batch processing: users accumulate transactions and input them into the computer in large batches

ü  Real-Time computing: allows instant access to information

ü  Interactive processing: has replaced batch processing for most applications

Ø  Users can now interact with data through terminals, viewing and changing values online in real-time.

Ø  Batch processing is still used for jobs in which it makes sense to do a lot of transactions at once.

ü  Databases and the Web

Ø  Information is available via a company’s Intranet and the Internet.

Ø  HTML, the language used to construct most Web pages, wasn’t designed to build database queries.

Ø  XML, a newer, more powerful data description language, is designed with industrial-strength database access in mind.

Ø  Web database strategies revolve around directories.

Ø  Directories are at the heart of many customer relationship management (CRM) systems—software systems for organizing and tracking information on customers.