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Database Management by Mind Map: Database   Management
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Database Management

Databases,Data,and Information




The Hierarchy of Data

A character is one byte

A field is a combination of one or more related characters

A record is a group of related fields

A data file is a collection of related records

Maintaining Data

File maintenance

Adding records

Modifying records

Deleting records


compares data with a set of rules or values to find out if the data is correct

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 vulnerable

Database Management Systems

A data dictionary

A query language

Query by example(QBE)

A form

A report generator

Relational,Object-Oriented,and Multidimensional Databases

A data model

A relational database

Each rowhas a primary key

Each columnhas a unique name

A relationship

Structured Query Language(SQL)

An object.oriented database (OODB)

A multidimensional database

A data warehouse

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

Video:How a Photo Sharing site Keeps Its Data

Database Administration

It is important to have a carefully designed database

Employees should learn how to use the data in the database effectively

Interact with database

Identify new data for the database

Maintain the database