Syntax error in aggregate argument: Expecting a single column argument with possible 'Child' qualifier

Question

DataTable distinctTable = dTable.DefaultView.ToTable(true,\"ITEM_NO\",\"ITEM_STOCK\");
DataTable dtSummerized = new DataTable(\"SummerizedResult\");

dtSummerized.Co         


        

Answer 1

You want to write:

dTable.Compute("sum(CONVERT(ITEM_STOCK, 'System.Double'))",
               "ITEM_NO='" + dRow["ITEM_NO"].ToString() + "'")

instead of:

dTable.Compute("sum(" + TotalItem + ")", "ITEM_NO="...

because it will translate to dTable.Compute("sum(value_of_TotalItem), "ITEM_NO="..., value_of_TotalItem is a double and is not a column name.

See DataTable.Compute

UPDATE:

try this:

DataTable distinctTable = dTable.Clone();
dTable.Columns.Add("ITEM_STOCK_D", typeof(Decimal),
                   "CONVERT(ITEM_STOCK, 'System.Decimal')");
foreach (DataRow dRow in dTable.Rows)
{
    String itemNo = dRow["ITEM_NO"].ToString();
    if(distinctTable.Select(String.Format("ITEM_NO = '{0}'",itemNo)).Length == 0)
    {
        double totalStock = Convert.ToDouble(dTable.Compute("SUM(ITEM_STOCK_D)",
                                     String.Format("ITEM_NO = '{0}'", itemNo))); 
        distinctTable.Rows.Add(itemNo, totalStock.ToString());
    }
}
dTable.Columns.Remove("ITEM_STOCK_D");