dmtb:
xh nllow nlhigh nlfd
1 0 25 T25岁以下
2 26 30 T26—30岁
3 31 35 T31—35岁
...............
9 60 100 T60及岁以上
tbbase
xm nl gzdw
张三 33 单位1
李四 42 单位2
.......
王五 60 单位1
查询：
nlfd zs
T25岁以下 0
T26—30岁 0
T31—35岁 1
.....
T60及岁以上 1
SQL
------解决方案--------------------
select nlfd,count(1) as zs from
dmtb,tbbase where nl between nllow and nlhigh
group by nlfd
------解决方案--------------------
select nlfd,count(1) as zs from
dmtb,tbbase where nl between nllow and nlhigh
group by nlfd
order by nlfd