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5 votes
2 answers
572 views

Calculating mean with group by based on another column in QGIS Field Calculator

I have daily temperature data for several cities from January to December. I'd like to calculate the average temperature per month for each city in a new column. I have a column "city", &...
GisUser's user avatar
  • 665
2 votes
2 answers
2k views

Filling attributes in one field based on second field with same values in QGIS

How do I fill the attribute with "SID_2" of the captured image where the ID of "SID_1" is NULL? I'm using QGIS 3.22
Don's user avatar
  • 29
3 votes
2 answers
813 views

Summarizing fields with same ID in QGIS Field Calculator

I am looking for a command, that sums the value of the field "Baulast" if they have the same "ogc_fid" and if there is a Number in the field "WEA". If there is no number ...
lesto's user avatar
  • 327
8 votes
4 answers
2k views

Adding unique ID for groups of items using Field calculator in QGIS

I have a set of string values in a shapefile's attribute column and want to assign a number to them in a way that each unique string gets an integer number, like this: How do I do this using the ...
Elise's user avatar
  • 125