I have a CSV-Layer with multiple columns (e.g. ID, owner_name) and well-known text data to contain information about polygons. One ID can be owned by to owners which would cause the feature to appear twice in the attribute table. I further created a virtual field which concentrates all owners into it.
The code of the virtual field looks like this
concatenate("owner_name" ,group_by:= "ID",concatenator:=', ',order_by:= "owner_name")
This results in a attribute table as follows
|ID||owner_name||all_owners [virtual field]|
Now I want to the atlas to iterate through all unique values in the all_owners column. In this case:
- Erica, Peter
Important: I do not want to create new (static) layers and use the dissolve function as the data in the "CSV"-Layer might get changed later on and everything shall get updated.
Note: The answer to this similar question (look here) does not work, as Virtual Layers cannot get access to virtual fields as far as I tried.