Extract data from the country with the highest number of sold items. It is easy to find the country with the highest number of sold items with: - a GroupBy node to calculate the number of sold items as sum(Quantity) by country; - then a Sorter node to sort the countries by decreasing number of sold items; - and finally a Row Filter node to extract only the first row (country) from the sorted list. Such country name now needs to be converted into the Value of a Flow Variable to overwrite the setting in the Row Filter node that extracts the data fro a given country. The necessary node here is TableRow To Variable. To consume a Flow Variable (that is to overwrite a configuration setting with the flow variable value) you can use: - the flow variable button on the side of the configuration setting - the Flow Variables tab in the node configuration window.