Mysql区间分组查询的实现方式

用户id        余额
1            100    
2            200    
3            3223
4            100001
5            100025
6            512123
7            565656
8            10000001

select 
    count(if(balance between 0 and 10000, id , null ) ) as "0-1万",
    count(if(balance between 10001 and 100000, id , null ) ) as "1-10万",
    count(if(balance between 100001 and 500000, id , null ) ) as "10-50万",
    count(if(balance between 500001 and 1000000, id , null ) ) as "50-100万",
    count(if(balance > 1000000, id , null ) ) as "100万+"
from user ;

select interval(balance,0,10000,100000,500000,1000000) as i ,count(*) 
from user group by i;

select elt(interval(balance,0,10000,100000,500000,1000000),"0-1万","1-10万","10-50万","50-100万","100万+") as region ,count(*) 
from user group by region;

lower        upper        region
0            10000        0-1万
10001        100000        1-10万
100001        500000        10-50万
500001        1000000        50-100万
1000000        2000000000    100万+

select region,count(*)
from user 
left join tmp on user.balance between tmp.lower and tmp.upper
group by region 

select case
         when tc.stick_count = 0 then
          '0'
         when tc.stick_count > 0 and tc.stick_count <= 3 then
          '1to3'
         when tc.stick_count > 3 and tc.stick_count<= 6 then
          '4to6'
         when tc.stick_count > 6 and tc.stick_count <= 9 then
          '7to9'
	     when tc.stick_count > 9 and tc.stick_count <= 12 then
          '10to12'
	     when tc.stick_count >  13 then
          'more13'
       end stickLevel,
       COUNT(DISTINCT user_account) total
  from t_stick_detail_hourly tc 
 group by case
         when tc.stick_count = 0 then
          '0'
         when tc.stick_count > 0 and tc.stick_count <= 3 then
          '1to3'
         when tc.stick_count > 3 and tc.stick_count<= 6 then
          '4to6'
         when tc.stick_count > 6 and tc.stick_count <= 9 then
          '7to9'
		 when tc.stick_count > 9 and tc.stick_count <= 12 then
          '10to12'
	     when tc.stick_count > 13 then
          'more13'
       end