SELECT COUNT(*)  FROM Principale as P, paese_t as Pa, OpzVendita as V, cliente_t as C 
	WHERE (P.Tipo = "vendita"  ) 
	AND (P.Paese = Pa.Paese_t_ID) AND (P.PrincipaleID = V.OpzVenditaID  ) AND (P.Cliente = C.Cliente_t_ID) AND P.FotoPiccolaURL<>"" AND 
	P.Cliente = 13Query errata contattare la Backward