Hi Mattijs,

one to many relations in QGIS are defined in the project properties: Project -> Properties ->Relations, then press the Add Relation button and define the parent and child layers/tables and the corresponding fields. In the feature form (with the identify tool) you will see the relation automatically.

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Am 11.02.2020 um 16:50 schrieb mattijs.vollenb...@laposte.net:
Hi,

I encounter a problem with the possibility of defining a one to many relationship in Qgis 3.

I have one shapefile with points. Each point has an alias (ex: Blt-1, Chp-1...), and information about this point. I then have a table, without any geographical information, with all the measurements at each point (for exemple multiple measurements of depth in Blt-1, and in Chp-1...). The alias of both tables are the same. But in the second table, it is not unique.
How do I establish a good one to many relationship?

In other words, I would like that when I click on Blt-1, all the measured depths appear.

Is this possible?

Thanks a lot for your help!

Mattijs

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