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database management system
Last modified: Tuesday, September 21, 2004 

A collection of programs that enables you to store, modify, and extract information from a database. There are many different types of DBMSs, ranging from small systems that run on personal computers to huge systems that run on mainframes. The following are examples of database applications:
  • 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 hierarchical 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 query, which is a stylized question. For example, the query


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

    The information from a database can be presented in a variety of formats. Most DBMSs include a report writer program that enables you to output data in the form of a report. Many DBMSs also include a graphics component that enables you to output information in the form of graphs and charts.

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    For pages about database management system . Also check out the following links!

    Related Links

    Database Journal 
    An excellent resource for database professionals.

    Oracle Corporation home page 
    The Oracle home page provides links to their line of products and solutions, corporate information and news, support, education, events, and partner information.

    KB Systems home page
    KB (Knowledge Based) Systems is a provider of relational database management tools for the M application development and user community. This home page offers links to their products and services, company information, and related Web links.

    Object Database Management Group
    Offers information about ODMG, a consortium of database management system vendors who are working on progressing specific standards of customer software across DBMS products. There are also direct links to more detailed information about ODMG.

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    related categories


    related terms

    aggregate function


    data dictionary

    data independence

    data mart

    data migration


    database engine


    distributed database

    drill down



    flat-file database

    fourth-generation language




    multidimensional DBMS



    Progress Software



    report writer

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