create table loan_applications (id int primary key auto_increment, name text, childrens int);
insert into loan_applications (name, childrens) values ('John', 1), ('Sarah', 3), ('John', 5);
select * from loan_applications;
select distinct loan_applications.name
from loan_applications
join loan_applications copy on loan_applications.childrens <> copy.childrens and loan_applications.name = copy.name
;
select distinct name
from loan_applications
where exists (
select childrens from loan_applications copy where loan_applications.childrens <> copy.childrens and loan_applications.name = copy.name
);