Essay on Database Introduction

Essay on Database

Introduction
Data, to any business, is an asset. How you input, retrieve and use that data can be simply a time consuming expense or make all the difference to the efficiency and cost saving of your business. On this report I consider the fundamental facts of databases and tools used to function the data inside them.

A database is a collection of processed information related to a particular subject or purpose. Let us consider an enterprise, such as Travel agents, that has a large amount of data kept for long periods of time in a computer. This data might include information about passengers, locations, flights, airlines, and personnel, for example. Typical relationships that might be represented include bookings (Which passengers have seats on which flights?) location (which passengers to which location?), and airlines (which airline to which location?). These types of data stored more or less permanently in a computer is called a database. (Ullman, 1982).

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You can think of a database as an electronic filling system. The data storage for database is accomplished by the use of one or more files. Traditional databases are organised by fields, records and files. A field is a single piece of information, such as, a person’s name or a location of university. A collection of related or similar fields is called a record. An example of a record would contain a person’s name, address, date of birth etc. And a file is a compete set of related records. For example, a telephone book is analogous to a file. It contains a list of records, each of which consists of fields: name, address and telephone number. (Wiederhold, 1977).