Add data under a selected group

Question

Hi,
How coud I add some employees under a certain group.
e.g. from hr schema employees table
I have all managers and I wnat to select one and under this manager to add an employee.
Thank you

Answer 1

if you have time, you give me an example, please?
how can I insert a new employee under greenberg manager?
Thank you
I have the following:
DECLARE
my_tree ITEM;
my_num NUMBER;
BEGIN
my_tree := Find_Item('BLOCK3.TREE4');
my_num := POPULATE_GROUP('RECORD_GROUP5');
FTREE.SET_TREE_PROPERTY(my_tree, FTREE.RECORD_GROUP, 'RECORD_GROUP5');
END;
and the recordgroup :
select -1, level, last_name, first_name, salary
from employees
start with manager_id is null
connect by prior employee_id = manager_id