isambiguated with prefix '??.'.</p>


<div class="detailHeader" id="foreignKey-detail">
foreignKey<span class="detailHeaderTag">
property
</span>
</div>

<div class="signature">
public string <b>$foreignKey</b>;</div>

<p>the foreign key in this relation</p>


<div class="detailHeader" id="group-detail">
group<span class="detailHeaderTag">
property
</span>
</div>

<div class="signature">
public string <b>$group</b>;</div>

<p>GROUP BY clause. For <a href="/doc/api/1.0/CActiveRelation">CActiveRelation</a> de