Tuesday, January 6, 2009

Form2 : Database Software

A database is a structured collection of records or data that is stored in a computer system. The structure is achieved by organizing the data according to a database model. The model in most common use today is the relational model. Other models such as the hierarchical model and the network model use a more explicit representation of relationships.

A database management system (DBMS) is computer software that manages databases. DBMSes may use any of a variety of database models, such as the network model or relational model. In large systems, a DBMS allows users and other software to store and retrieve data in a structured way.

The usages of Database Software :

Easy to find information

Can get information fast

Can get complete information

Data : (not process)

- refers to a collection of facts usually collected as the result of experience, observation or experiment, or processes within a computer system, or a set of premises. This may consist of numbers, words, or images, particularly as measurements or observations of a set of variables. Data is often viewed as a lowest level of abstraction from which information and knowledge are derived.

- is like raw material. It is not organized ad has little value.

- There can be text data, number or numerical data, image data, audio data and video data.

Information : (processed)

- as a concept has a diversity of meanings, from everyday usage to technical settings. Generally speaking, the concept of information is closely related to notions of constraint, communication, control, data, form, instruction, knowledge, meaning, mental stimulus, pattern, perception, and representation.

- is organized data that is valuable and meaningful to a specific user.

- An information system is a set of related components that collects data, processes data and provides information. Collect data – process data – provide information.