I would like to filter a layer with the maximum value of field_a, grouped by field_b. I tried this expression:
"field_a"= maximum ( "field_a","field_b") But it doesn't work (there are no more features in the layer). When I use this expression for Select by Expression, the features are selected. Is there a way to filter them (without selecting)?
[Edit] I want to filter a existing layer (right mouse click -> filter). I don't want to select features or to create a new layer.