Merge Datatable empty

I am trying to merge to data table using merge data table activity but I am getting the following output

I am getting an empty space while merging the source data table. How to avoid this

have you tried Join DataTables

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Yes i tried but i dont know the condition to pass since there no common column in bot data table

DataTable1.Merge(DataTable2) try this method once

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Thanks for your reply Its throwing an error as expression does not produce value

Hi @soumi_soumiya

I find your scenario similar to this one.
If yes, maybe you could refer to the sample xaml
as it also uses Merge Datatable activity.