group on generated column

Hi guys ,

I  generate a Datataset Witch 5 Attribute.  4 are generated from SQL Query and one using the Computed Columns property in the DataSet Window.

I know would like to execute a query based on this Dataset in order to group by the Computed Column.

Any idea how to do that?

Ps : I don t wanna use a Function in the DB in order to resolve that.