Dear all,
I have a dataset with information about products (numeric), their quantity, the importer (ISO code) and the exporter (ISO code) who sold the product to the importer. Now I would like to sum up the quanitity of one product (several importers could have bought it from one person (exporter)) of all importers who imported it from one particular exporter.
As I have a huge dataset, I would like to have one universal code for that if that is possible.
I hope this was understandable.
Thank you so much in advance for your help!
Cheers
Maria
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