select
#sql中subString_index的嵌套使用的用法
SUBSTRING_INDEX(SUBSTRING_INDEX(profile,',',3),',',-1) as age,
count(device_id) as NUMBER
from user_submit
group by age;
select
#sql中subString_index的嵌套使用的用法
SUBSTRING_INDEX(SUBSTRING_INDEX(profile,',',3),',',-1) as age,
count(device_id) as NUMBER
from user_submit
group by age;