with QueryVentas do
begin
Close;
SQL.Clear;
SQL.Add('SELECT * FROM ventas '+
' WHERE fecha_venta BETWEEN '+
QuotedStr(FormatDateTime( 'yyyy/mm/dd',edtFInicio.Date ))+
' AND '+ QuotedStr(FormatDateTime( 'yyyy/mm/dd',edtFFin.Date ))+
' ORDER BY id_venta DESC ');
Open;
if RecNo < 1 then
Close;
end;