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<title>Berkeley DB Reference Guide: Index - Indices and foreign keys</title>
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<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Java API Tutorial - Index</dl></h3></td>
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<h3 align=center>Index - Indices and foreign keys</h3>
<p>In the Basic example, each store has a single <i>primary key</i>. The
Index example extends the Basic example to add the use of <i>secondary
keys</i> and <i>foreign keys</i>.  The example program illustrates:</p>
<p><ul type=disc>
<li><a href="second.html">Opening secondary key indices</a>
<li><a href="foreign.html">Opening foreign key indices</a>
<li><a href="views.html">Creating indexed collections</a>
<li><a href="read.html">Retrieving items by index key</a>
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<p>The complete source
of the final version of the example program is included in the Berkeley DB
distribution.</p>
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