DATABASE

In computing, a database can be defined as a structured collection of records or data that is stored in a computer so that a program can consult it to answer queries. 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.

A database system offers many advantages:

· Rapidity date management of users

· Possibility to create entity relationships

· DBMS garantees date protection

· DBMS garantees access security

The term "database" originated within the computing discipline. Although its meaning has been broadened by popular use, even to include non-electronic databases, this article is about computer databases. Database-like records have been in existence since well before the industrial revolution in the form of ledgers, sales receipts and other business related collections of data.

Database is organized following three models:

· Relational model

· Hierarchical model

· Network model

The model in most common use today is the relational model.

The term database refers to the collection of related records, menaged by database management system or DBMS. The programmers of DBMS uses the language called "SQL" or structural query languages to make questions and to receive answers.

Today DBMS is the most used system in every aspect of working life.