Thanks a lot Tom.<br />
I&#39;ll solve it with a subquery.
<p>Carlos Sotto Maior (UOL)<br />
<a href="mailto:csotto@uol.com.br">csotto@uol.com.br</a></p>

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<hr />
<div><br />
<strong>De: </strong>&quot;Tom Lane&quot; &lt;tgl@sss.pgh.pa.us&gt;<br />
<strong>Enviada: </strong>2021/01/30 19:46:37<br />
<strong>Para: </strong>csotto@uol.com.br<br />
<strong>Cc: </strong> pgsql-bugs@lists.postgresql.org<br />
<strong>Assunto: </strong> Re: Use of HAVING (Select/Group By) on a output-name of an aggregate function causes SYNTAX ERROR<br />
&nbsp;</div>
&quot;Carlos Sotto Maior \(UOL\)&quot; &lt;csotto@uol.com.br&gt; writes:<br />
&gt; In other words: Postgresql is matching &lt;HAVING&gt; arguments to columns at<br />
&gt; table level instead of matching to a group by result level.<br />
<br />
That&#39;s per SQL standard. The fact that we allow the case in<br />
GROUP BY is an anachronism. (You&#39;ll find also that we only allow it<br />
for GROUP BY items that are *just* an output column name, not any<br />
more-complicated <span>expression</span>. The equivalent restriction for HAVING<br />
would make such a feature near useless anyway.)<br />
<br />
regards, tom lane