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create table person(
id int auto_increment,
name varchar(100),
manager_id int,
primary key (id)
);
insert into person (name, manager_id) values('Vasya', null),
('Petya', 1), ('Kostya', 2), ('Serega', 3), ('Sanya', null);
with recursive person_tree(id, name, manager_path) as(
select id, name, cast(id as char(200))
from person
where manager_id is null
union all
select s.id, s.name, concat(m.manager_path, ",", s.id)
from person_tree m join person s on m.id=s.manager_id
)
select * from person_tree order by manager_path;
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