I would like to calculate the sum of values in one column, based on values in another column. To illustrate my question I uploaded the picture below. The second column consists of zipcodes, the third total sales. I would like to know what the total sales per zipcode are? So in this case:
What is the sum of column three for column two's value
1023? Output then should be
4 (0+1+1+2+0). The sum for
1024 then should be 11,5 following the same logic.
As this is quite a large dataset I would like to have the QGIS field calculator (or any other tool) calculate a new field which states the total sales in the zipcode. So far I can't seem to get it working and was hoping someone here could help me.
As you can see I have some missing values, is this a problem in calculation? Perhaps good to mention is that it is a table.