Join multiple DataRows into a single DataRow

Question

I am writing this in C# using .NET 3.5. I have a System.Data.DataSet object with a single DataTable that uses the following schema:

Id      :  uint
AddressA:  s         


        

Answer 1

most efficient solution would be to do the sum in SQL directly

select AddressA, SUM(bytes) from ... group by AddressA