we can do this within an assign activity, doing a check on int base and can handle defensive the empty filterresult as mentionend by @Yoichi
LHS: Result | DataType: List(Of DataRow) =
(from myRow in dtData.AsEnumerable()
where CInt(myRow("Amount").toString.Trim) > 1000
select r = myRow).toList
then check within an if acitvity
Result.Count > 0
Then: dtResult = Result.CopyToDataTable
Else: dtResult = dtData.Clone
In case of Int conversion issues we can add some handlings on non parseable Amount values as well