I have a shapefile (one layer) with my country but I have a problem.
It is divided into 4 entries (prefectures), and I want it as one, not 4.
Also, there is a table with some data, and I want to have one row with the sum of the data. For example:
Entry 1: population 10.000, entry 2: population 20.000, entry 3: population 30.000, entry 4: population 40.000.
Ultimately I want something similar to this:
main piece: population 100.000.
(I don't care if this will be done by hand, its not much work!).
I'm a new QGIS user and i don't know much. Any help would be really appreciated greatly!