alter table dt390 rename column di029725 to di029725_temp;
alter table dt390 add (di029725 number(10,0));
update dt390 set di029725 = to_number(di029725_temp);
alter table dt390 drop column di029725_temp;
update dt412 set di003141 = 'IT' where di000238 = '029725';

alter table dt522 rename column di024338 to di024338_temp;
alter table dt522 add (di024338 number(10,0));
update dt522 set di024338 = to_number(di024338_temp);
alter table dt522 drop column di024338_temp;
update dt412 set di003141 = 'IT' where di000238 = '024338';