update patient set selfphone=concat(left(selfphone ,3),'*****',right(selfphone ,4)) update patient set familyphone=concat(left(familyphone ,3),'*****',right(familyphone ,4)); update patient set id_num=concat(left(id_num,6),'*****',right(id_num,2)); update patient set birthday=concat(left(birthday,4),'**'); update patient set name=concat(left(name,1),'**');
