Mysql查找指定字符串长度数据并替换

查找数据长度为3的姓名

select char_length("张三");  -- 2
select distinct name from db.table where char_length(name) = 3;

批量将姓名"张三"替换"张x"

update db.table set name=insert(name, 2, 1, 'x') where char_length(name) = 3;