public StoredProcedure SalesbyYear(DateTime Beginning_Date,DateTime Ending_Date){
StoredProcedure sp=new StoredProcedure("Sales by Year",this.Provider);
sp.Command.AddParameter("Beginning_Date",Beginning_Date,DbType.DateTime);
sp.Command.AddParameter("Ending_Date",Ending_Date,DbType.DateTime);
return sp;
}
public StoredProcedure SalesByCategory(string CategoryName,string OrdYear){