SELECT 
G01.Contatore, 
Tabx.Data, 
Tabx.Ruota, 
Tabx.Primo, 
Tabx.Secondo, 
Tabx.Terzo, 
Tabx.Quarto, 
Tabx.Quinto
FROM 
Tabx 
INNER JOIN 
(
SELECT DISTINCT 
TabY.Data, 
nz((SELECT DISTINCT SUM(1) AS xx FROM  (SELECT DISTINCT  Tabx.Data FROM  Tabx)  AS TabZ  WHERE TabZ.Data>TabY.Data  ),0)+1 AS Contatore
FROM 
Tabx AS TabY
) AS G01 
ON 
Tabx.Data = G01.Data
ORDER BY 
Tabx.Data DESC
;