MySQL有limit语句，而SQL Server中没有，以下为类似功能实现

1、top n

# 取最近10个月数据	
SELECT TOP 10 * FROM test
ORDER BY 月份 DESC;	

2、ROW_NUMBER() + where子句

# 取最近10个月数据	
SELECT * FROM
(
SELECT ROW_NUMBER()over(order by 月份 DESC) AS rm,* from test
) AS b
WHERE rm<=12
order by 月份