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<h1 class="topictitle1">Creating a database with territory-based collation</h1>



<div><p>By default, <span>Derby</span> uses
Unicode codepoint collation. However, you can specify territory-based collation
when you create the database.</p>

<div class="section"><p>You can use the <samp class="codeph">collation</samp> and <samp class="codeph">territory</samp> attributes
to specify territory-based collation. This type of collation applies only
to user-defined tables. The system tables use the Unicode codepoint collation. </p>
<div class="restriction"><span class="restrictiontitle">Restriction: </span>The <samp class="codeph">collation</samp> attribute can be specified
only when you create a database. You cannot specify this attribute on an existing
database or when you upgrade a database.</div>
<p>To create a database with
territory-based collation:</p>
</div>


<div class="p"><span>Specify the language and country codes for the <samp class="codeph">territory</samp> attribute,
and the TERRITORY_BASED value for the <samp class="codeph">collation</samp> attribute
when you create the database.</span> <p>For example:</p>
<pre>jdbc:derby:MexicanDB;create=true;territory=es_MX;collation=TERRITORY_BASED </pre>
</div>


<div class="example"><h4 class="sectiontitle">Creating a case-insensitive database</h4>
<p>The <samp class="codeph">collation</samp> value TERRITORY_BASED uses the default
collation strength for the locale, usually TERTIARY, which will consider
character case significant in searches and comparisons. To make the database
use case-insensitive searches, specify an explicit strength with the
<samp class="codeph">collation</samp> attribute. The strength name is appended to
TERRITORY_BASED with a colon to separate them.</p>

<p>For example:</p>

<pre>jdbc:derby:SwedishDB;create=true;territory=sv_SE;collation=TERRITORY_BASED:PRIMARY</pre>

<p>With strength PRIMARY, the characters 'A' and 'a' will be considered equal,
as well as 'à' ('a' with a grave accent). (This behavior is
commonly the default with many other databases.) To make searches
respect differences in accent, use strength SECONDARY.</p>

<p>The exact interpretation of the strength part of the attribute depends upon
the locale.</p>

<p>For more information, see
<a href="cdevcollation.html#cdevcollation">Character-based collation in Derby</a> and the documentation of
the <samp class="codeph">collation</samp> attribute in the
<span><em>Java DB Reference Manual</em></span>.</p>

</div>

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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="cdevdvlp51654.html" title="You specify attributes on the Derby connection URL.">Working with the database connection URL attributes</a></div>
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