subtotal in datalist

Does anyone know how to implement subtotals in a datalist.

Like this

            2004

                        Boeing              1

                        Milgard              3

                                    total      4
            2003

                        Boeing              2

                        Where Every      7

                                    total      9
                     
            2002

                        Boeing              7

                        etc…                1

                                    total      8

 
vinny45Asked:
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DotNetLover_BaanConnect With a Mentor Commented:
I would suggest use SQL queries on the table. Like..  "SELECT SUM(Ammount) FROM SalaryTable GROUP BY Year"
-Baan
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topless_stangConnect With a Mentor Commented:
I agree with Baan.  Only further thought is to combine the summary with the detail records, like:
  SELECT 0 AS TotalRow, Year,Title, Amount FROM SalaryTable
  UNION
  SELECT 1 AS TotalRow, Year,'Total' AS Title, SUM(Amount) FROM SalaryTable GROUP BY Year
  ORDER BY Year, Total, Title

I like adding a column like TotalRow for both the ORDER BY and to do things like bold the row in the output.
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