Discuss Data Base Management Systems.

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A database is an organised body of related files and or information.  It is simply an automated library system an is maintained as an integral part of most organisations worldwide.  A cite on the World Wide Web, the Webopedia Computer Dictionary, refers to the database as a collection of information organized and presented to serve a specific purpose. (A telephone book is a common database.) A computerized database is an updated, organized file of machine readable information that is rapidly searched and retrieved by computer.  

A Data Base Management System is a collection of  that enables you to , modify, and extract information from a . There are many different types of DBMSs, ranging from small  that  on  to huge systems that run on . The following are examples of :

  • computerized library systems
  • automated teller machines
  •  flight reservation systems
  • computerized parts inventory systems

From a technical standpoint, DBMSs can differ widely. The terms relational, network, flat, and  all refer to the way a DBMS organizes information internally. The internal organization can affect how quickly and flexibly you can extract information.  Requests for information from a database are made in the form of a , which is a stylized question. For example, the query :


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requests all  in which the NAME  is SMITH and the AGE field is greater than 35. The set of rules for constructing queries is known as a . Different DBMSs  different query languages, although there is a semi-standardized query language called  (structured query language). Sophisticated  for managing database systems are called , or 4GLs for short.

The information from a database can be presented in a variety of formats. Most DBMSs include a  program that enables you to   in the form of a . Many DBMSs also include a  component that enables you to output information in the form ...

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