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<!DOCTYPE html> <html lang="es" dir="ltr"> <head> <base href="../../../"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Asistente para tablas. Establecer clave principal</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="es/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="es/bookmarks.js" defer></script><script type="text/javascript" src="es/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="es/text/shared/05/new_help.html"><div></div></a><a class="logo" href="es/text/shared/05/new_help.html"><p dir="auto">Ayuda de LibreOffice 25.2</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">Módulo</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">Contenido</label><div id="Contents" class="contents-treeview"></div></aside><div id="SearchFrame"><div id="Bookmarks"> <input id="search-bar" type="search" class="search" placeholder="Buscar en los marcadores del módulo elegido" 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"> <noscript><div id="WarnJS"><h1 dir="auto">Active JavaScript en el navegador para mostrar las páginas de ayuda de LibreOffice.</h1></div></noscript> <a id="setprimary"></a> <h1 id="par_idN10546" dir="auto">Asistente para tablas - Establezca la clave primaria</h1> <p id="par_idN10556" class="paragraph" dir="auto">Especifica un campo de la tabla que se utilizará como clave principal.</p> <a id="bm_id2796411"></a> <h2 id="par_idN10559" dir="auto">Crear una clave principal</h2> <p id="par_idN1055D" class="paragraph" dir="auto"><span class="avis">Seleccione para crear una clave primaria. Añada una clave primaria a cada tabla de la base de datos para identificar de forma exclusiva cada registro. Para algunos sistemas de bases de datos dentro de LibreOffice, una clave primaria es obligatoria para editar las tablas.</span></p> <a id="bm_id1500289"></a> <h3 id="par_idN10560" dir="auto">Añadir una clave principal automáticamente</h3> <p id="par_idN10564" class="paragraph" dir="auto"><span class="avis">Seleccione esta opción para añadir automáticamente una clave principal como un campo adicional.</span></p> <a id="bm_id9485152.00000001"></a> <h3 id="par_idN10567" dir="auto">Utilizar un campo existente como clave principal</h3> <p id="par_idN1056B" class="paragraph" dir="auto"><span class="avis">Seleccione para utilizar un campo existente con valores únicos como clave primaria.</span></p> <a id="bm_id6801049"></a> <h4 id="par_idN1056E" dir="auto">Nombre de campo</h4> <p id="par_idN10572" class="paragraph" dir="auto"><span class="avis">Seleccione el nombre del campo.</span></p> <a id="bm_id8796349"></a> <a id="bm_id1406292"></a> <h4 id="par_idN10575" dir="auto">Valor automático</h4> <p id="par_idN10579" class="paragraph" dir="auto"><span class="avis">Seleccione esta opción para insertar automáticamente un valor e incrementar el valor del campo con cada nuevo registro. La base de datos debe admitir el incremento automático para poder utilizar la opción de <span class="emph">Valor automático</span>.</span></p> <a id="bm_id130008"></a> <h3 id="par_idN1057C" dir="auto">Definir clave principal por varios campos</h3> <p id="par_idN10580" class="paragraph" dir="auto"><span class="avis">Seleccione la opción para crear una clave principal a partir de una combinación de varios campos.</span></p> <a id="bm_id2555009"></a> <h4 id="par_idN10583" dir="auto">Campos disponibles</h4> <p id="par_idN10587" class="paragraph" dir="auto"><span class="avis">Seleccione un campo y pulse en > para añadirlo a la lista de campos de clave principal.</span></p> <div class="embedded"> <a id="take"></a> <h3 id="hd_id3150443" dir="auto">></h3> <p id="par_id3148538" class="paragraph" dir="auto"><span class="avis">Pulse para mover los campos seleccionados al cuadro al cual apunta la flecha.</span></p> </div> <div class="embedded"> <a id="remove"></a> <h3 id="hd_id3155419" dir="auto"><</h3> <p id="par_id3149763" class="paragraph" dir="auto"><span class="avis">Pulse para mover los campos seleccionados al cuadro al cual apunta la flecha.</span></p> </div> <a id="bm_id8829309"></a> <h4 id="par_idN1059A" dir="auto">Campos de clave principal</h4> <p id="par_idN1059E" class="paragraph" dir="auto"><span class="avis">Seleccione un campo y pulse en < para quitarlo de la lista de campos de la clave primaria. La clave primaria se crea como una concatenación de los campos en esta lista, de arriba a abajo.</span></p> <p id="par_idN105A1" class="paragraph" dir="auto"><a target="_top" href="es/text/sdatabase/tablewizard04.html">Asistente para tablas - Creación de tabla</a></p> </div> <div id="DonationFrame"></div> <footer><h2 style="text-align: center;"><a href="https://books.libreoffice.org" target="_blank">Libros de LibreOffice</a></h2> <div class="noteicon" dir="auto" style="display:flex;justify-content:center;flex-wrap:wrap;row-gap:15px;"> <img src="media/navigation/libo-writer.svg" alt="Writer Icon" style="width:60px;height:60px;"><img src="media/navigation/libo-calc.svg" alt="Calc Icon" style="width:60px;height:60px;"><img src="media/navigation/libo-impress.svg" alt="Impress Icon" style="width:60px;height:60px;"><img src="media/navigation/libo-draw.svg" alt="Draw Icon" style="width:60px;height:60px;"><img src="media/navigation/libo-base.svg" alt="Base Icon" style="width:60px;height:60px;"><img src="media/navigation/libo-math.svg" alt="Math Icon" style="width:60px;height:60px;"><img src="media/navigation/libo-symbol-black.svg" alt="Getting Started Icon" style="width:60px;height:60px;"> </div> <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: Asistente para tablas. 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