Sum of columns

[loginerror (Maciej Kuźmicz)]

Yes, it looks like for simple sum you would type in the columnName as string.

As far as the GroupByColumns function goes and other options, I hope the thread of the custom activity will be of help:

BalaReva.DataTable.Activities

It has the custom activities for the easy functionality of datatable under the namespace of DataTableExtensions. 1.Add Data Row Range. 2.Remove Data Row Select. 3.Group By Aggregation (Sum,Count,Avg, Max, Min). Package: BalaReva.DataTable.Activities Author: @balupad14