题解 | #对过长的昵称截取处理#

select uid,
case when char_length(nick_name)>13 then concat(substr(nick_name, 1, 10), '...')
else nick_name
end as nick_name
from user_info
where char_length(nick_name)>10;

需要注意字符长度用char_length()函数来计算，而length()是用来计算字节长度的。不要混淆了！！！