[Qgis-user] union tool

[DelazJ]

Hi,

The merge algorithm
https://docs.qgis.org/3.4/en/docs/user_manual/processing_algs/qgis/vectorgeneral.html#merge-vector-layers
?

Harrissou

Le ven. 5 avr. 2019 à 07:45, Stefan Giese (WhereGroup) <
stefan.giese at wheregroup.com> a écrit :

> You can use virtual layers (one possibility) with a union statement,
> something like:
>
> SELECT geometry, field1, field2 FROM layer1
> UNION SELECT geometry, field1, field2 FROM layer2
> UNION SELECT geometry, field1, field2 FROM layer3
> ...
>
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>
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>
> Am 2019-04-05 05:45, schrieb Boaz Bar Ilan:
> > hi
> >
> > is there a way to union many polygons which belongs to different
> > layers all at once?
> >
> > thanks
> >
> > boaz
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