Axpta X++ : Show data in axapta. By Method

How show data in Overview?

1. Code :: Old code it long and waste memory.

   SalesTable   tmpSalesTable ;
    ;
    SELECT * FROM tmpSalesTable
    WHERE tmpSalesTable.SalesId == this.RefSalesId ;

    return Country::name( tmpSalesTable.DeliveryCountry);



2. Code :: New code it short and easy. But you use this code. In Table have Method find.

return Country::name( SalesTable::find(this.RefSalesId).DeliveryCountry);