Access: Problema Query - Tabelle

SELECT 
(Sum([NomeQuery].[MATTINA])+Sum([NomeQuery].[POMERIGGIO]))/(Count(*)*2) AS Media
FROM NomeQuery
HAVING 
(((NomeQuery.DATA)>#2/11/2014# And (NomeQuery.DATA)<#2/14/2014#))
;

PARAMETERS DalGiorno DateTime, AlGiorno DateTime;
SELECT 
Z01.UTENTE, 
Max(Z01.MaPo) AS Maaa, 
Min(Z01.MaPo) AS Miii, 
StDev(Z01.MaPo) AS Dvvv
FROM 
(
SELECT 
NomeQuery.UTENTE, 
NomeQuery.MATTINA AS MaPo
FROM 
NomeQuery
WHERE 
(((NomeQuery.DATA)>[DalGiorno] And (NomeQuery.DATA)<[AlGiorno]))
UNION ALL 
SELECT 
NomeQuery.UTENTE, 
NomeQuery.POMERIGGIO AS MaPo
FROM 
NomeQuery
WHERE 
(((NomeQuery.DATA)>[DalGiorno] And (NomeQuery.DATA)<[AlGiorno]))
) AS Z01
GROUP BY 
Z01.UTENTE
;