How to count unique row value & insert into the same excel sheet?

[ppr (Peter Preuss)]

@foxngn
create a report datatable with build datatable activity - dtReport
Columns: Category, Count

use an assign activity
left side: dtReport
Right side:

(From d in YourDataTableVar.AsEnumerable
Group d by k=d("Category").toString.Trim into grp=Group
let ra = new Object(){k, grp.Count}
Select r=dtReport.Rows.Add(ra)).CopyToDataTable

Also have alook here:

[HowTo] Overview on different options for grouping data and processing the groups

This HowTo introduces on the different options for grouping data from a datatable in order to process the grouped data. Introduction Grouping data and processing the grouped data is a common scenario e.g. when the grouped data is to aggregate like summing up, find maximum, get the average or concatening items. Lets have a look on following data: [grafik] A possible scenario could be: Create a report containing following information: the region code the sum of CaseCount per RegionCode t…