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Database Management by Mind Map: Database
Management
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Database Management

Databases Data and Information

Database

collection of data organized in a manner

Data

collection of unprocessed items Text,Numbers

Information

Processed data Documents,Audio,Images Video

The Hierarchy of Data

Data is organized in layers

A character is one byte

New node

File Processing Versus Databases

File processing system

Each department has its own set of files

Used for many years

Have data redundancy

Isolate data

Database approach

Programs and users share data

Reduce data redundancy

Improve data integrity

share data

Allows easier access

Reduces development time

Can be more volnerable

Maintaining Data

Validation

Alphabetic/Numenc check

Range check

Consisteney check

Completeness check

check digit

Cther checks

File maintenance

Adding records

Modifying records

Dleting records

Database Management Systems

Backup

Log

Recovery utility

Continuous backup

Relational, Object-Oriented, and Multidimensional Databases

Multimedia database

Groupware database

Computer aided design database

Hypertext database

Web Databases

Databases on the Web allow you to

Shop for products or services

Buy or sell stocks

Search for a job

Make airline reservations

Register for college classes

Check semester grades