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<!DOCTYPE html> <html lang="en-US" dir="ltr"> <head> <base href="../../../"> <noscript><meta http-equiv="refresh" content="0; URL=../../../en-US/noscript.html"></noscript> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Table Wizard - Set Primary Key</title> <link rel="shortcut icon" href="media/navigation/favicon.ico"> <link type="text/css" href="normalize.css" rel="Stylesheet"> <link type="text/css" href="prism.css" rel="Stylesheet"> <link type="text/css" href="default.css" rel="Stylesheet"> <script type="text/javascript" src="polyfills.js"></script><script type="text/javascript" src="languages.js"></script><script type="text/javascript" src="en-US/langnames.js"></script><script type="text/javascript" src="flexsearch.debug.js"></script><script type="text/javascript" src="prism.js"></script><script type="text/javascript" src="help2.js" defer></script><script type="text/javascript" src="a11y-toggle.js" defer></script><script type="text/javascript" src="paginathing.js" defer></script><script type="text/javascript" src="en-US/bookmarks.js" defer></script><script type="text/javascript" src="en-US/contents.js" defer></script><script type="text/javascript" src="help.js" defer></script><meta name="viewport" content="width=device-width,initial-scale=1"> </head> <body> <header id="TopLeftHeader"><a class="symbol" href="en-US/text/shared/05/new_help.html"><div></div></a><a class="logo" href="en-US/text/shared/05/new_help.html"><p dir="auto">LibreOffice 24.2 Help</p></a><div class="dropdowns"><div class="modules"> <button type="button" data-a11y-toggle="modules-nav" id="modules" aria-haspopup="true" aria-expanded="false" aria-controls="modules-nav">Module</button><nav id="modules-nav" hidden=""></nav> </div></div></header><aside class="leftside"><input id="accordion-1" name="accordion-menu" type="checkbox"><label for="accordion-1" dir="auto">Contents</label><div id="Contents" class="contents-treeview"></div></aside><div id="SearchFrame"><div id="Bookmarks"> <input id="search-bar" type="search" class="search" placeholder="Search in bookmarks for chosen module" dir="auto"><div class="nav-container" tabindex="0"><nav class="index" dir="auto"></nav></div> </div></div> <div id="DisplayArea" itemprop="softwareHelp" itemscope="true" itemtype="http://schema.org/SoftwareApplication"> <a name="setprimary"></a> <h1 id="par_idN10546" dir="auto">Table Wizard - Set Primary Key</h1> <p id="par_idN10556" class="paragraph" dir="auto">Specifies a field in the table to be used as a primary key.</p> <a name="bm_id2796411"></a> <h2 id="par_idN10559" dir="auto">Create a primary key</h2> <p id="par_idN1055D" class="paragraph" dir="auto"><span class="avis">Select to create a primary key. Add a primary key to every database table to uniquely identify each record. For some database systems within LibreOffice, a primary key is mandatory for editing the tables.</span></p> <a name="bm_id1500289"></a> <h3 id="par_idN10560" dir="auto">Automatically add a primary key</h3> <p id="par_idN10564" class="paragraph" dir="auto"><span class="avis">Select to automatically add a primary key as an additional field.</span></p> <a name="bm_id9485152.00000001"></a> <h3 id="par_idN10567" dir="auto">Use an existing field as a primary key</h3> <p id="par_idN1056B" class="paragraph" dir="auto"><span class="avis">Select to use an existing field with unique values as a primary key.</span></p> <a name="bm_id6801049"></a> <h4 id="par_idN1056E" dir="auto">Field name</h4> <p id="par_idN10572" class="paragraph" dir="auto"><span class="avis">Select the field name.</span></p> <a name="bm_id8796349"></a> <a name="bm_id1406292"></a> <h4 id="par_idN10575" dir="auto">Auto value</h4> <p id="par_idN10579" class="paragraph" dir="auto"><span class="avis">Select to automatically insert a value and increment the field's value for each new record. The database must support automatic incrementation in order to use the <span class="emph">Auto value</span> feature.</span></p> <a name="bm_id130008"></a> <h3 id="par_idN1057C" dir="auto">Define primary key by several fields</h3> <p id="par_idN10580" class="paragraph" dir="auto"><span class="avis">Select to create a primary key from a combination of several existing fields.</span></p> <a name="bm_id2555009"></a> <h4 id="par_idN10583" dir="auto">Available fields</h4> <p id="par_idN10587" class="paragraph" dir="auto"><span class="avis">Select a field and click > to add it to the list of primary key fields.</span></p> <div class="embedded"> <a name="take"></a> <h3 id="hd_id3150443" dir="auto">></h3> <p id="par_id3148538" class="paragraph" dir="auto"><span class="avis">Click to move the selected field(s) to the box that the arrow is pointing to.</span></p> </div> <div class="embedded"> <a name="remove"></a> <h3 id="hd_id3155419" dir="auto"><</h3> <p id="par_id3149763" class="paragraph" dir="auto"><span class="avis">Click to move the selected field(s) to the box that the arrow is pointing to.</span></p> </div> <a name="bm_id8829309"></a> <h4 id="par_idN1059A" dir="auto">Primary key fields</h4> <p id="par_idN1059E" class="paragraph" dir="auto"><span class="avis">Select a field and click < to remove it from the list of primary key fields. The primary key is created as a concatenation of the fields in this list, from top to bottom.</span></p> <p id="par_idN105A1" class="paragraph" dir="auto"><a target="_top" href="en-US/text/sdatabase/tablewizard04.html">Table Wizard - Create table</a></p> </div> <div id="DonationFrame"></div> <footer><div id="DEBUG" class="debug"> <h3 class="bug">Help content debug info:</h3> <p dir="auto">This page is: <a href="https://opengrok.libreoffice.org/xref/help/source/text/sdatabase/tablewizard03.xhp" target="_blank">/text/sdatabase/tablewizard03.xhp</a></p> <p dir="auto">Title is: Table Wizard - Set Primary Key</p> <p id="bm_module" dir="auto"></p> <p id="bm_system" dir="auto"></p> <p id="bm_HID" dir="auto"></p> </div></footer> </body> </html>