I have installed QGIS 2.12 Lyon and I need to dissolve multiple polygons according to one column in the dbf file (my layer is a shapefile).
I have used SAGA "Polygon dissolve by attribute" algorithm and it works OK. The issue is that in my original file I have 7 columns, one of which is used to dissolve the polygons. The dbf file of the new layer has only 1 field - the one used to dissolve polygons.
How do I force SAGA to keep my other fields?
I just need one entry for each new polygon - information is repeated anyway.
Using the interface I could not see any option to select a method to retain information for other fields.