have a look here:
[HowTo] Overview on different options for grouping data and processing the groups - News / Tutorials - UiPath Community Forum
later it will discuss the updatings on a subset of rows
we have the options:
- LINQ Where filtering and returning the result as a collection (list/array of DataRows)
- DefaultView approach as described
As long we do not use Statements/Activities that are changing the DataTable identity - DataRow link we can filter and update directly on the Master