Mysql Count(*) come totale DOVE Totale?

Penso che tu volessi filtrare i gruppi. Usa HAVING COUNT(*) invece di WHERE :

SELECT Id, QId, UName, Ans, Date, Count(*) * 10 as Total
FROM question
GROUP BY UName
HAVING Count(*)

Se vuoi ordinare i gruppi in base al numero di elementi, usa ORDER BY :

SELECT Id, QId, UName, Ans, Date, Count(*) * 10 as Total
FROM question
GROUP BY UName
ORDER BY Count(*) DESC