Human Area Network
DATA BASE SYSTEM
Introduction
Data is a virtual organizational resource which is an important input in an information system. This data resource is traditionally called the data base. It is from this data base that data is processed and converted into information to satisfy information needs of the organization. Nowadays we find that the internal and external information resources available to organizations are increasing at a rapid rate, due to which data bases are becoming larger and larger in size. At the same time, business environment has forced the business to take quick and right decisions for which database are required to be queried frequently. Queries may be varied, e.g. one manager may be interested to know the names of all those products for which sales in the current year exceed that of the previous year, one may require information on the total amount outstanding, or one may require the list of products having a market share greater than 30 per cent and so on. To correctly process varied types of queries and to ensure fast response time the use of computer – based information systems have become a necessity of any business.
To need the objective of fast retrieval of data, computer – based information system should be able to organize, store and manage data effectively and efficiently. There are two main methods two organize data on computer media, which are known as files and databases.
What is a Database?
Traditionally, different types of information are stored in different places, e.g. product information is stored in a filing cabinet, supplier phone numbers in a card file, order information in a computerized spreadsheet like Ms – Excel, and customer addresses in mailing list. Compiling and updating information from these multiple sources of data turn out to be a very tedious process.
A database is a collection of information in the digital form related to a particular subject or purpose, such as tracking
Introduction
Data is a virtual organizational resource which is an important input in an information system. This data resource is traditionally called the data base. It is from this data base that data is processed and converted into information to satisfy information needs of the organization. Nowadays we find that the internal and external information resources available to organizations are increasing at a rapid rate, due to which data bases are becoming larger and larger in size. At the same time, business environment has forced the business to take quick and right decisions for which database are required to be queried frequently. Queries may be varied, e.g. one manager may be interested to know the names of all those products for which sales in the current year exceed that of the previous year, one may require information on the total amount outstanding, or one may require the list of products having a market share greater than 30 per cent and so on. To correctly process varied types of queries and to ensure fast response time the use of computer – based information systems have become a necessity of any business.
To need the objective of fast retrieval of data, computer – based information system should be able to organize, store and manage data effectively and efficiently. There are two main methods two organize data on computer media, which are known as files and databases.
What is a Database?
Traditionally, different types of information are stored in different places, e.g. product information is stored in a filing cabinet, supplier phone numbers in a card file, order information in a computerized spreadsheet like Ms – Excel, and customer addresses in mailing list. Compiling and updating information from these multiple sources of data turn out to be a very tedious process.
A database is a collection of information in the digital form related to a particular subject or purpose, such as tracking