SQL语句按年龄段分组统计人数_MySQL

SQL语句按年龄段分组统计人数

Java代码

create table #t(Uname varchar(10),age int)

insert #t

select '啊啊',19 union all

select '信息',23 union all

select '宝宝',31 union all

select '喔喔',21 union all

select '米米',6

select nnd as '年龄段',count(*) as '人数' from(

select

case

when age>=1 and age<=10 then '1-10'

when age>=11 and age<=20 then '11-20'

when age>=21 and age<=30 then '21-30'

when age>=31 and age<=40 then '31-40'

end

as nnd,uname from #t

)a group by nnd