Snowflake Unable to get the hierarchy columns values

Question

I have below table from which i am trying to get the correspondent manager name against the employee

TITLE                           EMPLOYEE_ID   MANAGER_ID
President                         1 
Vice President Engineering        10             1
Programmer                        100            10
QA Engineer                       101            10
Vice President HR                 20             1
Health Insurance Analyst          200            20

i used below hierarchy query to get the result

select employee_id, manager_id, title,  prior report_title
  from employees
    start with title = 'President'
    connect by
      manager_id = prior employee_id
  order by employee_id;

But result not returning as i expected

Expected:

EMPLOYEE_ID   MANAGER_ID    title                         report_title
  10             1          Vice President Engineering    President 

Can anyone help on this?

Answer 1

If you use a recursive CTE, you can get the output you want.

with emptree as
(select employee_id, title, manager_id, null as report_title
 from employees
 where manager_id is null
 union all
 select employees.employee_id, employees.title, employees.manager_id, emptree.title
  from employees
  join emptree
  on employees.manager_id = emptree.employee_id
)
select employee_id, manager_id, title, report_title
from emptree
order by employee_id;

EMPLOYEE_ID	MANAGER_ID	TITLE	REPORT_TITLE
1	NULL	President
10	1	Vice President Engineering	President
20	1	Vice President HR	President
100	10	Programmer	Vice President Engineering
101	10	QA Engineer	Vice President Engineering
200	20	Health Insurance Analyst	Vice President HR