select CONCAT(left(user_truename, 1),‘*‘,right(user_truename, 1)),

CONCAT(left(user_tel, 3),‘*****‘,right(user_tel, 3)),

CONCAT(left(user_platenumber, 2),‘*****‘,right(user_platenumber, 2)),CONCAT(region_name,‘_‘,region_name1)

from cb_user_5000

按指定位置进行字符串替换的sql