How to add column in existing datatable and write the data to that data column

Help
1

I am trying to add column in existing datatable which is defined as ExtractDataTable and also need to add the data to that column and need to export the full datatable to excel sheet

2

can you help me with this

3

Hi @DIVYA_VUNJALI

There is an activity called Add Data Column that you can use.
You can also see here for more reference.