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<title>Join Columns Information</title>
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<div class="sect3"><!-- infolevel="all" infotype="General" -->
<h1>Join Columns Information</h1>
<p>This table lists the fields available in the <span class="gui-object-title">Join Table</span> area in <span class="gui-object-title">JPA Details</span> view for <a href="tasks015.htm#BABHFAFJ">Many-to-one mapping</a> and <a href="tasks017.htm#BABFHBCJ">One-to-one mapping</a> mapping types.</p>
<div class="inftblruleinformal">
<table class="RuleInformal" title="This table describes the options on the Join Columns tab." summary="This table describes the options on the Join Columns tab." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0">
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t12">Property</th>
<th align="left" valign="bottom" id="r1c2-t12">Description</th>
<th align="left" valign="bottom" id="r1c3-t12">Default</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t12" headers="r1c1-t12">Join Column</td>
<td align="left" headers="r2c1-t12 r1c2-t12"><a id="sthref208" name="sthref208"></a><a id="sthref209" name="sthref209"></a>Specify a mapped column for joining an entity association. This field corresponds to the <code>@JoinColum</code> attribute.
<p>Select <span class="bold">Override Default</span>, then Add, Edit, or Remove the join columns.</p>
</td>
<td align="left" headers="r2c1-t12 r1c3-t12">By default, the mapping is assumed to have a single join.</td>
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<a href="task_mapping.htm#BABDGBIJ">Mapping an entity</a>
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<a href="reference030.htm#CACCGEHC">Edit Join Columns Dialog</a></div>
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