Firstly, thanks to those who already helped me with this. I have established a relation between non-spatial catch records in a postgis table and a table of station information (linked via foreign key). If I click on a station with the info tool, I can see the various catch records from that station - so the relation is working. But that seems to be it. If I filter on the species in the catch, that only applies to the catch data showing up when I select a station - it does NOT hide stations where that species was not caught. I cannot change symbology based on a relation, I cannot select features based on a relation - all I can do is view the records - and with 70 fields in the station layer, the catch records are just a small window at the bottom of the form. It seems that to be useful I need to create the view or table in the database & access this with QGIS - whioch has issues for users without create access in the database - which is most of them. Is work on this area (relations) of QGIS actively ongoing, or should I look for non-QGIS approaches? Thanks, Brent Wood
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