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    On 3/14/2021 5:28 PM, Andrea Giudiceandrea wrote:

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      <pre class="moz-quote-pre" wrap="">David Strip-4 wrote

</pre>

      <blockquote type="cite">

        <pre class="moz-quote-pre" wrap="">aggregate( 'B','sum', "Confirmed", "Country_Region" 

ILIKE attribute($currentfeature, 'SOVEREIGNT')) 

</pre>

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      <pre class="moz-quote-pre" wrap="">

Hi David,

in the filter the source feature can be accessed with the variable @parent

<a class="moz-txt-link-freetext" href="https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/functions_list.html#aggregate">https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/functions_list.html#aggregate</a>

aggregate( 'B','sum', "Confirmed", "Country_Region" ILIKE attribute(@parent,

'SOVEREIGNT'))

</pre>

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    that did it. Does that mean that <i>attribute(@parent, ...)</i> is

    the value of the attribute for the feature for which the attribute

    is being calculated?<br>

    And what does $currentfeature mean? Is it evaluated to the current

    feature of Layer B, not A?<br>

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