查询每组数据中最新月份的记录

id	year	month
111	2012	1
111	2012	2
111	2013	1
112	2012	1
112	2012	2
112	2012	3
112	2012	4

注：每一组（id，year，month） 都是唯一的，我现在要 查询出

(111,2013,1)

(112,2012,4)

SELECT a.*

FROM A a,

(

SELECT a.id, max(b.year) as year

, max(a.month) AS month

FROM A a,

(

SELECT c.id

, max(c.year) year

FROM A c

GROUP BY c.payItemId

) b

WHERE a.id=b.id AND a.year=b.year

GROUP BY a.id

) b

WHERE a.id = b.id AND a.year=b.year AND a.month = b.month

用了3层嵌套才查出来，不知有没有简便的方法，欢迎各位大神指正