你可以这样做:

例如有多少单位将于 2012 年到期:

e.g. how many units are due to expire in 2012:

SELECT MONTH(cvu.ExpirationDate) AS Mnth, YEAR(cvu.ExpirationDate) AS Yr, 
    COUNT(*) AS DueToExpire
FROM clientvehicleunit cvu
WHERE cvu.ExpirationDate >= '20120101' AND cvu.ExpirationDate < '20130101'
GROUP BY MONTH(cvu.ExpirationDate), YEAR(cvu.ExpirationDate)