Hi List. With QGIS >=2.16, it is possible to use aggregates in expressions, such as sum, average... etc.
But when I use it to create a new virtual field using the field calculator, the newly created field value is null for all of the layer's entity. Am I doing it wrong ? Or it is a bug, or a known limitation ( found nothing on the web, qgis doc and in the qgis bug tracker ) ? Thanks ! ( I posted a duplicate of this question on gis.stackexchange : http://gis.stackexchange.com/questions/216871/qgis-2-16-creating-virtual-field-with-aggregate-expressions )
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