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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <script src="./callback.js" type="text/javascript"></script> <noscript>Your browser does not support JavaScript. This help page requires JavaScript to render correctly.</noscript> </head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <meta name="generator" content="Oracle DARB XHTML Converter (Mode = ohj/ohw) - Version 5.1.1 Build 005" /> <meta name="date" content="2009-04-21T9:46:25Z" /> <meta name="robots" content="noarchive" /> <meta name="doctitle" content="About the NLS_SORT Parameter" /> <meta name="relnum" content="11g Release 2 (11.2)" /> <meta name="partnum" content="E10766-01" /> <link rel="copyright" href="./dcommon/html/cpyr.htm" title="Copyright" type="text/html" /> <link rel="stylesheet" href="./dcommon/css/blafdoc.css" title="Oracle BLAFDoc" type="text/css" /> <link rel="contents" href="toc.htm" title="Contents" type="text/html" /> <link rel="prev" href="tdddg_globalization026.htm" title="Previous" type="text/html" /> <link rel="next" href="tdddg_globalization028.htm" title="Next" type="text/html" /> <title>About the NLS_SORT Parameter</title> </head> <body> <div class="zz-skip-header"><a href="#BEGIN">Skip Headers</a></div> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr valign="bottom"> <td align="left"></td> <td align="center"><a href="tdddg_globalization026.htm"><img width="24" height="24" src="./dcommon/gifs/leftnav.gif" alt="Previous" /><br /> <span class="icon">Previous</span></a> </td> <td align="center"><a href="tdddg_globalization028.htm"><img width="24" height="24" src="./dcommon/gifs/rightnav.gif" alt="Next" /><br /> <span class="icon">Next</span></a></td> </tr> </table> <p><a id="CACJEJIB" name="CACJEJIB"></a><a id="TDDDG62810" name="TDDDG62810"></a></p> <div class="sect2"><!-- infolevel="all" infotype="General" --> <h1>About the NLS_SORT Parameter</h1> <a name="BEGIN" id="BEGIN"></a> <p><a id="sthref683" name="sthref683"></a><span class="bold">Specifies:</span> Linguistic sort order (collating sequence) for queries that have the <code>ORDER</code> <code>BY</code> clause.</p> <p><span class="bold">Acceptable Values:</span></p> <ul> <li> <p><code>BINARY</code></p> <p>Sort order is based on the binary sequence order of either the database character set or the national character set, depending on the data type.</p> </li> <li> <p>Any linguistic sort name that Oracle supports</p> <p>Sort order is based on the order of the specified linguistic sort name. The linguistic sort name is usually the same as the language name, but not always. For a list of supported linguistic sort names, see <a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=NLSPG014','newWindow').focus()"><span class="italic">Oracle Database Globalization Support Guide</span></a>.</p> </li> </ul> <p><span class="bold">Default Value:</span> Set by <code>NLS_LANGUAGE</code>, described in <a href="tdddg_globalization017.htm#CACCIJIA">"About the NLS_LANGUAGE Parameter"</a>.</p> <p>The following example shows how two different <code>NLS_SORT</code> settings affect the displayed result of the same query. The settings are <code>BINARY</code> and Traditional Spanish (<code>SPANISH_M</code>). Traditional Spanish treats ch, ll, and ñ as letters that follow c, l, and n, respectively.</p> <p>To try this example in SQL Developer, enter the statements and queries in the SQL Worksheet. For information about the SQL Worksheet, see <a href="tdddg_selecting002.htm#BCGHHIJG">"Running Queries in SQL Developer"</a>. The results shown here are from SQL*Plus; their format is slightly different in SQL Developer.</p> <div class="example"><a id="CACGJDGF" name="CACGJDGF"></a><a id="TDDDG268" name="TDDDG268"></a> <p class="titleinexample">NLS_SORT Affects Linguistic Sort Order</p> <ol> <li> <p>Create table for Spanish words:</p> <pre xml:space="preserve" class="oac_no_warn"> CREATE TABLE temp (name VARCHAR2(15)); </pre></li> <li> <p>Populate table with some Spanish words:</p> <pre xml:space="preserve" class="oac_no_warn"> INSERT INTO temp (name) VALUES ('laguna'); INSERT INTO temp (name) VALUES ('llama'); INSERT INTO temp (name) VALUES ('loco'); </pre></li> <li><a id="CACCJAHE" name="CACCJAHE"></a> <p>Note the current value of <code>NLS_SORT</code>.</p> <p>For instructions, see <a href="tdddg_globalization011.htm#CACIIJGI">"Viewing NLS Parameter Values"</a>.</p> </li> <li> <p>If the valueof <code>NLS_SORT</code> in step <a href="#CACCJAHE">3</a> is not <code>BINARY</code>, change it:</p> <pre xml:space="preserve" class="oac_no_warn"> ALTER SESSION SET <span class="bold">NLS_SORT=BINARY</span>; </pre></li> <li><a id="CACDEJDF" name="CACDEJDF"></a> <p>Run this query:</p> <pre xml:space="preserve" class="oac_no_warn"> SELECT * FROM temp ORDER BY name; </pre> <p>Result:</p> <pre xml:space="preserve" class="oac_no_warn"> NAME --------------- laguna <span class="bold">llama</span> <span class="bold">loco</span> </pre></li> <li> <p>Change the value of <code>NLS_SORT</code> to <code>SPANISH_M</code> (Traditional Spanish):</p> <pre xml:space="preserve" class="oac_no_warn"> ALTER SESSION SET <span class="bold">NLS_SORT=SPANISH_M</span>; </pre></li> <li> <p>Repeat the query from step <a href="#CACDEJDF">5</a>.</p> <p>Result:</p> <pre xml:space="preserve" class="oac_no_warn"> NAME --------------- laguna <span class="bold">loco</span> <span class="bold">llama</span> </pre></li> <li> <p>Drop the table:</p> <pre xml:space="preserve" class="oac_no_warn"> DROP TABLE temp; </pre></li> <li> <p>Set <code>NLS_SORT</code> to the value that it had at step <a href="#CACCJAHE">3</a>.</p> </li> </ol> </div> <!-- class="example" --> <a id="TDDDG269" name="TDDDG269"></a> <p class="subhead2">Case-Insensitive and Accent-Insensitive Sorts</p> <p><a id="sthref684" name="sthref684"></a><a id="sthref685" name="sthref685"></a><a id="sthref686" name="sthref686"></a><a id="sthref687" name="sthref687"></a>Operations inside Oracle Database are sensitive to the case and the accents of the characters. To perform a case-insensitive sort, append <code>_CI</code> to the value of the <code>NLS_SORT</code> parameter (for example, <code>BINARY_CI</code> or <code>XGERMAN_CI</code>). To perform a sort that is both case-insensitive and accent-insensitive, append <code>_AI</code> to the value of the <code>NLS_SORT</code> parameter (for example, <code>BINARY_AI</code> or <code>FRENCH_M_AI</code>).</p> <div class="helpinfonotealso"> <h2>Related Topics</h2> <p><a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=NLSPG230','newWindow').focus()"><span class="italic">Oracle Database Globalization Support Guide</span></a> for more information about the <code>NLS_SORT</code> parameter</p> <p><a href="javascript:open('http://www.oracle.com/pls/db112/lookup?id=NLSPG290','newWindow').focus()"><span class="italic">Oracle Database Globalization Support Guide</span></a> for more information about case-insensitive and accent-insensitive sorts</p> <p><a href="tdddg_globalization007.htm#i1008368">About Linguistic Sorting and String Searching</a></p> <p><a href="tdddg_globalization012.htm#CACJAJGC">Changing NLS Parameter Values</a></p> </div> </div> <!-- class="sect2" --> <!-- Start Footer --> <div class="footer"> <table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%"> <col width="86%" /> <col width="*" /> <tr> <td align="left"><span class="copyrightlogo">Copyright © 1996, 2009, Oracle and/or its affiliates. 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