Thanks so much for your reply. For information, i try to do with Postgis
the union Qgis Geoprocessing :
https://docs.qgis.org/3.40/en/docs/user_manual/processing_algs/qgis/vectoroverlay.html#union
Le mar. 24 juin 2025 à 12:11, Darafei "Komяpa" Praliaskouski
a écrit :
> Hello,
>
> I am not sure w
Hello,
I am not sure what you wanted to do, but the query you wrote runs union
pairwise between all objects of the first table and second table, creating
NxM objects each of which is a sum of two different polygons in the first
and second layer. It is entirely possible that this consumes all of yo
