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<!DOCTYPE html> <html lang="en"> <head> <title>database from FOLDOC</title> <meta http-equiv="Content-Security-Policy" content="default-src 'unsafe-inline' http: https:"> <meta name="verify-v1" content="siAI0ZOMn41hao0E/T76D1I2L3MtFjzE48P3ctCjRNU="> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="msapplication-TileColor" content="#da532c"> <meta name="theme-color" content="#ffffff"> <meta name="google-translate-customization" content="828219db36930e1e-c51d915bf2ea717c-g9b503f9a85d5b5a7-a">  <script src="https://www.googletagmanager.com/gtag/js?id=UA-9715943-1"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'UA-9715943-1'); </script>  <link href="//fonts.googleapis.com/css?family=Duru+Sans%7CBelgrano%7CInconsolata%7CAlef%7CArmata" rel="stylesheet" type="text/css"> <link rel="stylesheet" type="text/css" href="/css/layout.css?2">  <link 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"//connect.facebook.net/en_GB/all.js#xfbml=1"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk')); </script> <div id="container"> <div id="left"> <a href="/"> <img src="/foldoc.gif" width="300" height="98" alt="Free On-line Dictionary of Computing" class="logo"> </a> <div id="nav"> <a href="/contents.html" class="button">Contents</a> <a href="/help.html" class="button">Help</a> <a href="/random-entry" class="button">Random</a> </div> <form action="/"> <input type="text" name="query" id="query" autofocus="autofocus"> <input type="submit" name="action" value="Search" class="button"> </form> <div id="content"> <h2>database entries</h2> <p><div class="word-list"> <table> <tr><td><a href="/Access">Access</a></td><td><a href="/active+DBMS">active DBMS</a></td><td><a href="/ActiveX+Data+Objects">ActiveX Data Objects</a></td></tr> <tr><td><a href="/ADABAS">ADABAS</a></td><td><a href="/ADAMO">ADAMO</a></td><td><a href="/Adaplex">Adaplex</a></td></tr> <tr><td><a href="/Adaptive+Server+Enterprise">Adaptive Server Enterprise</a></td><td><a href="/Aditi">Aditi</a></td><td><a href="/Advanced+Revelation">Advanced Revelation</a></td></tr> <tr><td><a href="/ALTER">ALTER</a></td><td><a href="/An+Evolutionary+System+for+On-line+Programming">An Evolutionary System for On-line Programming</a></td><td><a href="/ASE">ASE</a></td></tr> <tr><td><a href="/binary+large+object">binary large object</a></td><td><a href="/BTRIEVE+Technologies,+Inc.">BTRIEVE Technologies, Inc.</a></td><td><a href="/Call-Level+Interface">Call-Level Interface</a></td></tr> <tr><td><a href="/candidate+key">candidate key</a></td><td><a href="/Cardbox+for+Windows">Cardbox for Windows</a></td><td><a href="/child+record">child record</a></td></tr> <tr><td><a href="/CLI">CLI</a></td><td><a href="/CO2">CO2</a></td><td><a href="/Codd's+reduction+algorithm">Codd's reduction algorithm</a></td></tr> <tr><td><a href="/ColdFusion">ColdFusion</a></td><td><a href="/column">column</a></td><td><a href="/compound+key">compound key</a></td></tr> <tr><td><a href="/conflation">conflation</a></td><td><a href="/count">count</a></td><td><a href="/cursor">cursor</a></td></tr> <tr><td><a href="/Customer+Information+Control+System">Customer Information Control System</a></td><td><a href="/database">database</a></td><td><a href="/database+management+system">database management system</a></td></tr> <tr><td><a href="/database+normalisation">database normalisation</a></td><td><a href="/database+query+language">database query language</a></td><td><a href="/database+transaction">database transaction</a></td></tr> <tr><td><a href="/Data+definition+language">Data definition language</a></td><td><a href="/data+dictionary">data dictionary</a></td><td><a href="/data+dictionary+file">data dictionary file</a></td></tr> <tr><td><a href="/Data+Manipulation+Language">Data Manipulation Language</a></td><td><a href="/data+mart">data mart</a></td><td><a href="/data+mining">data mining</a></td></tr> <tr><td><a href="/data+model">data model</a></td><td><a href="/DataStage">DataStage</a></td><td><a href="/DATATRIEVE">DATATRIEVE</a></td></tr> <tr><td><a href="/data+warehouse">data warehouse</a></td><td><a href="/DB2">DB2</a></td><td><a href="/DB2+catalog">DB2 catalog</a></td></tr> <tr><td><a href="/DBPL">DBPL</a></td><td><a href="/DD">DD</a></td><td><a href="/DDM">DDM</a></td></tr> <tr><td><a href="/deductive+database">deductive database</a></td><td><a href="/directory+service">directory service</a></td><td><a href="/Distributed+Data+Management">Distributed Data Management</a></td></tr> <tr><td><a href="/distributed+data+warehouse">distributed data warehouse</a></td><td><a href="/domain+calculus">domain calculus</a></td><td><a href="/drill+down">drill down</a></td></tr> <tr><td><a href="/dynamic+database+management+system">dynamic database management system</a></td><td><a href="/EDS%2b">EDS+</a></td><td><a href="/English">English</a></td></tr> <tr><td><a href="/entity">entity</a></td><td><a href="/entity-relationship+diagram">entity-relationship diagram</a></td><td><a href="/entity-relationship+model">entity-relationship model</a></td></tr> <tr><td><a href="/Entry+Sequenced+Data+Set">Entry Sequenced Data Set</a></td><td><a href="/ERC">ERC</a></td><td><a href="/ETL">ETL</a></td></tr> <tr><td><a href="/ETM">ETM</a></td><td><a href="/EXODUS">EXODUS</a></td><td><a href="/extensible+database">extensible database</a></td></tr> <tr><td><a href="/field">field</a></td><td><a href="/flat+file+database">flat file database</a></td><td><a href="/FOCUS">FOCUS</a></td></tr> <tr><td><a href="/foreign+key">foreign key</a></td><td><a href="/FoxBASE%2b">FoxBASE+</a></td><td><a href="/FoxPRO">FoxPRO</a></td></tr> <tr><td><a href="/functional+database">functional database</a></td><td><a href="/functional+dependency">functional dependency</a></td><td><a href="/Graph-Oriented+Object+Database">Graph-Oriented Object Database</a></td></tr> <tr><td><a href="/hierarchical+database">hierarchical database</a></td><td><a href="/HyperBase">HyperBase</a></td><td><a href="/identifier">identifier</a></td></tr> <tr><td><a href="/IDMS">IDMS</a></td><td><a href="/IDMSX">IDMSX</a></td><td><a href="/IMS/Data+Base">IMS/Data Base</a></td></tr> <tr><td><a href="/IMS/Data+Communications">IMS/Data Communications</a></td><td><a href="/Independent+Logical+File">Independent Logical File</a></td><td><a href="/index">index</a></td></tr> <tr><td><a href="/IndexedDB">IndexedDB</a></td><td><a href="/Indexed+Sequential+Access+Method">Indexed Sequential Access Method</a></td><td><a href="/Information+Management+System">Information Management System</a></td></tr> <tr><td><a href="/inner+join">inner join</a></td><td><a href="/Integrated+Database+Management+System">Integrated Database Management System</a></td><td><a href="/integrity">integrity</a></td></tr> <tr><td><a href="/integrity+constraint">integrity constraint</a></td><td><a href="/intelligent+database">intelligent database</a></td><td><a href="/intelligent+key">intelligent key</a></td></tr> <tr><td><a href="/inverted+index">inverted index</a></td><td><a href="/Java+Database+Connectivity">Java Database Connectivity</a></td><td><a href="/JAZELLE">JAZELLE</a></td></tr> <tr><td><a href="/join">join</a></td><td><a href="/key">key</a></td><td><a href="/Keyed+Sequenced+Data+Set">Keyed Sequenced Data Set</a></td></tr> <tr><td><a href="/key+field">key field</a></td><td><a href="/Microsoft+Access">Microsoft Access</a></td><td><a href="/Microsoft+Data+Access+Components">Microsoft Data Access Components</a></td></tr> <tr><td><a href="/Microsoft+SQL+Server">Microsoft SQL Server</a></td><td><a href="/Mimer+SQL">Mimer SQL</a></td><td><a href="/Mu">Mu</a></td></tr> <tr><td><a href="/Multics+Relational+Data+Store">Multics Relational Data Store</a></td><td><a href="/multiple+value">multiple value</a></td><td><a href="/Multi-Version+Concurrency+Control">Multi-Version Concurrency Control</a></td></tr> <tr><td><a href="/MySQL">MySQL</a></td><td><a href="/National+Database+Language">National Database Language</a></td><td><a href="/network+database">network database</a></td></tr> <tr><td><a href="/NOMAD">NOMAD</a></td><td><a href="/normal+form">normal form</a></td><td><a href="/normalisation">normalisation</a></td></tr> <tr><td><a href="/null">null</a></td><td><a href="/NVL">NVL</a></td><td><a href="/Object+Data+Management+Group">Object Data Management Group</a></td></tr> <tr><td><a href="/object-oriented+database">object-oriented database</a></td><td><a href="/object+relational+mapping">object relational mapping</a></td><td><a href="/OLE+DB">OLE DB</a></td></tr> <tr><td><a href="/On-Line+Analytical+Processing">On-Line Analytical Processing</a></td><td><a href="/On-Line+Transaction+Processing">On-Line Transaction Processing</a></td><td><a href="/Open+DataBase+Connectivity">Open DataBase Connectivity</a></td></tr> <tr><td><a href="/OpenInsight">OpenInsight</a></td><td><a href="/operational+database">operational database</a></td><td><a href="/Operational+Data+Store">Operational Data Store</a></td></tr> <tr><td><a href="/OPS">OPS</a></td><td><a href="/Optimal+Flexible+Architecture">Optimal Flexible Architecture</a></td><td><a href="/Oracle+7">Oracle 7</a></td></tr> <tr><td><a href="/Oracle+Parallel+Server">Oracle Parallel Server</a></td><td><a href="/Oracle+Rdb">Oracle Rdb</a></td><td><a href="/ORM">ORM</a></td></tr> <tr><td><a href="/outer+join">outer join</a></td><td><a href="/Paradox">Paradox</a></td><td><a href="/partial+key">partial key</a></td></tr> <tr><td><a href="/PE">PE</a></td><td><a href="/periodic+group">periodic group</a></td><td><a href="/Persistent+Functional+Language">Persistent Functional Language</a></td></tr> <tr><td><a href="/PFL">PFL</a></td><td><a href="/phpmyadmin">phpmyadmin</a></td><td><a href="/POSTGRES">POSTGRES</a></td></tr> <tr><td><a href="/PostgreSQL">PostgreSQL</a></td><td><a href="/PowerBuilder">PowerBuilder</a></td><td><a href="/primary+key">primary key</a></td></tr> <tr><td><a href="/query">query</a></td><td><a href="/Query+By+Example">Query By Example</a></td><td><a href="/Quicksilver">Quicksilver</a></td></tr> <tr><td><a href="/R:BASE">R:BASE</a></td><td><a href="/record">record</a></td><td><a href="/Red+Brick+Intelligent+SQL">Red Brick Intelligent SQL</a></td></tr> <tr><td><a href="/referential+integrity">referential integrity</a></td><td><a href="/relation">relation</a></td><td><a href="/relational+algebra">relational algebra</a></td></tr> <tr><td><a href="/relational+calculus">relational calculus</a></td><td><a href="/relational+database">relational database</a></td><td><a href="/relational+data+model">relational data model</a></td></tr> <tr><td><a href="/Relative+Record+Data+Set">Relative Record Data Set</a></td><td><a href="/Remote+Database+Access">Remote Database Access</a></td><td><a href="/repeating+group">repeating group</a></td></tr> <tr><td><a href="/replication">replication</a></td><td><a href="/repository">repository</a></td><td><a href="/rollback">rollback</a></td></tr> <tr><td><a href="/row-level+locking">row-level locking</a></td><td><a href="/schema">schema</a></td><td><a href="/secondary+key">secondary key</a></td></tr> <tr><td><a href="/sharding">sharding</a></td><td><a href="/SPARC">SPARC</a></td><td><a href="/SQL">SQL</a></td></tr> <tr><td><a href="/SQL2">SQL2</a></td><td><a href="/SQL3">SQL3</a></td><td><a href="/SQL+Server">SQL Server</a></td></tr> <tr><td><a href="/SQL+server">SQL server</a></td><td><a href="/SQR">SQR</a></td><td><a href="/static+database+management+system">static database management system</a></td></tr> <tr><td><a href="/stock-keeping+unit">stock-keeping unit</a></td><td><a href="/stored+procedure">stored procedure</a></td><td><a href="/sublanguage">sublanguage</a></td></tr> <tr><td><a href="/surrogate+key">surrogate key</a></td><td><a href="/system+catalog">system catalog</a></td><td><a href="/System+R">System R</a></td></tr> <tr><td><a href="/table">table</a></td><td><a href="/table+locking">table locking</a></td><td><a href="/tablespace">tablespace</a></td></tr> <tr><td><a href="/temporal+database">temporal database</a></td><td><a href="/trigger">trigger</a></td><td><a href="/tuple+calculus">tuple calculus</a></td></tr> <tr><td><a href="/Tuxedo">Tuxedo</a></td><td><a href="/two-phase+commit">two-phase commit</a></td><td><a href="/uid">uid</a></td></tr> <tr><td><a href="/Uniface">Uniface</a></td><td><a href="/Unify">Unify</a></td><td><a href="/union">union</a></td></tr> <tr><td><a href="/unique+key">unique key</a></td><td><a href="/varchar">varchar</a></td><td><a href="/Very+Large+Database">Very Large Database</a></td></tr> <tr><td><a href="/Virtual+Storage+Access+Method">Virtual Storage Access Method</a></td><td><a href="/Visual+FoxPro">Visual FoxPro</a></td><td><a href="/VULCAN">VULCAN</a></td></tr> <tr><td><a href="/Watcom+SQL">Watcom SQL</a></td><td><a href="/Windows+4GL">Windows 4GL</a></td><td> </td></tr> </table> </div></p> <p class="vertical-space"></p> <hr> <div></div> <hr>  <div id="HCB_comment_box">Loading</div> <link rel="stylesheet" type="text/css" href="//www.htmlcommentbox.com/static/skins/bootstrap/twitter-bootstrap.css?v=0"> <script language="javascript" id="hcb"> hcb_user = { PAGE: 'https://foldoc.org/contents/database.html', comments_header: ' ', no_comments_msg: ' ', err_comment_empty: 'Your comment was not posted because it was empty!', rss: '', }; var s = document.createElement("script"); s.setAttribute("type", "text/javascript"); s.setAttribute("src", "//www.htmlcommentbox.com/jread?page=" + escape(hcb_user.PAGE).replace(/\+/g, "%2B") + "&mod=%241%24wq1rdBcg%24.0y2uzvjA2bsnhzpXVq9F." + "&opts=17374&num=10"); // No e-mail field: 16846 if (typeof s != "undefined") document.getElementsByTagName("head")[0].appendChild(s); </script> <script> setTimeout(function () { 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