--虚拟临时表
with tb1 as
(
    select 1 as id ,2009 as v_year,5 as v_month union all
    select 2,2010,12 union all
    select 3,2011,2 union all
    select 4,2010,5 union 
    select 5,2010,7 
)
select * from tb1
where v_year>=year('2010-05-01') and v_month>=MONTH('2010-05-01') 
    and 
      v_year<=year('2011-12-01') and v_month<=MONTH('2011-12-01') 
/*
id          v_year      v_month
----------- ----------- -----------
2           2010        12
4           2010        5
5           2010        7

(3 row(s) affected
*/