--create table
create table kol_employees_tmp
(
employee_id   number(5) not null,
name          varchar2(50) not null,
manager_id    number(5) ,
create_date   date
)--insert data
begininsert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(172,'Bates',148,to_date('2010-11-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(169,'Bloom',148,to_date('2011-08-21', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(173,'Kumar',148,to_date('2009-06-11', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(168,'Ozer',148,to_date('2009-10-07', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(100,'King',null,to_date('2009-01-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(148,'Cambrault',100,to_date('2009-01-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(170,'Fox',148,to_date('2009-03-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(147,'Errazuriz',100,to_date('2010-11-23', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(167,'Banda',147,to_date('2009-09-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(103,'Hunold',102,to_date('2009-12-03', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(166,'Ande',147,to_date('2010-12-14', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(171,'Smith',148,to_date('2012-05-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(102,'DeHaan',100,to_date('2012-01-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(107,'Lorentz',103,to_date('2012-11-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(106,'Pataballa',103,to_date('2009-01-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(105,'Austin',103,to_date('2011-01-01', 'YYYY-MM-DD'));
insert into kol_employees_tmp(employee_id, name, manager_id, create_date) values(104,'Ernst',103,to_date('2011-11-01', 'YYYY-MM-DD'));end;

--create temp table
with kol_employees_tmp as(
select '2010-11-01' create_date, 172 employee_id, 148 manager_id, 'Bates' name from dual
union all
select null create_date, 169 employee_id, 148 manager_id, 'Bloom' name from dual
union all
select null create_date, 173 employee_id, 148 manager_id, 'Kumar' name from dual
union all
select null create_date, 168 employee_id, 148 manager_id, 'Ozer' name from dual
union all
select '2000-04-04' create_date, 100 employee_id, null manager_id, 'King' name from dual
union all
select null create_date, 148 employee_id, 100 manager_id, 'Cambrault' name from dual
union all
select null create_date, 170 employee_id, 148 manager_id, 'Fox' name from dual
union all
select '2010-11-23' create_date, 147 employee_id, 100 manager_id, 'Errazuriz' name from dual
union all
select '2009-09-01' create_date, 167 employee_id, 147 manager_id, 'Banda' name from dual
union all
--select '2009-12-03' create_date, 103 employee_id, 102 manager_id, 'Hunold' name from dual
select '2013-12-03' create_date, 103 employee_id, 102 manager_id, 'Hunold' name from dual
union all
select null create_date, 166 employee_id, 147 manager_id, 'Ande' name from dual
union all
select null create_date, 171 employee_id, 148 manager_id, 'Smith' name from dual
union all
select '2012-01-01' create_date, 102 employee_id, 100 manager_id, 'DeHaan' name from dual
union all
select null create_date, 107 employee_id, 103 manager_id, 'Lorentz' name from dual
union all
select '2009-01-01' create_date, 106 employee_id, 103 manager_id, 'Pataballa' name from dual
union all
--select '2011-01-01' create_date, 105 employee_id, 103 manager_id, 'Austin' name from dual
select '2018-01-01' create_date, 105 employee_id, 103 manager_id, 'Austin' name from dual
union all
select null create_date, 104 employee_id, 103 manager_id, 'Ernst' name from dual
)
,
condition_list  as(
select emp.employee_id,emp.manager_id,emp.name,emp.create_date,level level_id
from kol_employees_tmp emp
where 1=1
and emp.create_date is not null
--start with emp.employee_id = :p_root_item -- itme no
start with emp.employee_id = 100 -- itme no
connect by prior emp.employee_id = emp.manager_id
)
,
redo_employees as(
select t2.employee_id,t2.manager_id,t2.name,t2.create_date,t2.parent_create_date,t2.level_id
from(select t1.employee_id,t1.manager_id,t1.name,t1.create_date,t1.parent_create_date,                t1.level_id,--t1.path,--t1.isleaf,                  row_number() over(partition by t1.employee_id, t1.manager_id order by t1.parent_create_date desc) maxover_seqfrom(select emp.employee_id,emp.manager_id,emp.name,emp.create_date,connect_by_root(emp.create_date) parent_create_date,                                          level level_id--sys_connect_by_path(emp.employee_id || decode(emp.manager_id,null, '', '*' || emp.manager_id), '/') path,      --connect_by_isleaf isleaffrom kol_employees_tmp empwhere 1=1--and emp.employee_id in( 102, 105, 106, 147, 167,172)             -- start with emp.employee_id = 100  start with emp.employee_id in(select cl.employee_id from condition_list cl)     --in( 102, 105, 106, 147, 167,172, 103)     connect by prior emp.employee_id = emp.manager_id--order siblings by emp.name
        ) t1) t2
where 1=1
and t2.maxover_seq = 1
---------------------
union all
select ket2.employee_id,ket2.manager_id,ket2.name,ket2.create_date,ket2.create_date parent_create_date,level level_id
from kol_employees_tmp ket2
--start with ket2.employee_id = decode( (select count(1) from condition_list where employee_id = :p_root_item), 0, :p_root_item, '-1') -- itme no
start with ket2.employee_id = decode( (select count(1) from condition_list where employee_id = 100), 0, 100, '-1') -- itme no
connect by     ket2.employee_id not in(select cl.employee_id from condition_list cl)  --in( 102, 105, 106, 147, 167,172, 103) -- break level
and prior ket2.employee_id = ket2.manager_id
)
--query process tables
select emp.employee_id,emp.manager_id,emp.name,emp.create_date,emp.parent_create_date,level level_id
from redo_employees emp
--start with emp.employee_id = :p_root_item  -- itme no
start with emp.employee_id = 100  -- itme no
connect by prior emp.employee_id = emp.manager_id
order siblings by emp.name;