Temukan seluruh pohon dari akar yang memberikan simpul apa pun

Anda harus terlebih dahulu melintasi pohon untuk mendapatkan semua manajer lalu melintasi ke bawah untuk mengambil semua karyawan:

select level, employee_id, last_name, manager_id ,
       connect_by_root employee_id as root_id
   from employees
connect by prior employee_id = manager_id -- down the tree
start with manager_id in ( -- list up the tree
     select manager_id 
       from employees
     connect by employee_id = prior manager_id -- up the tree
     start with employee_id = 101
     )
;

Lihat http://www.sqlfiddle.com/#!4/d15e7/18

Sunting:

Jika simpul yang diberikan mungkin juga merupakan simpul akar, perluas kueri untuk menyertakan simpul yang diberikan dalam daftar simpul induk:

Contoh untuk simpul non-root:

select distinct employee_id, last_name, manager_id 
   from employees
connect by prior employee_id = manager_id -- down the tree
start with manager_id in ( -- list up the tree
     select manager_id 
       from employees
     connect by employee_id = prior manager_id -- up the tree
     start with employee_id = 101
     union 
     select manager_id -- in case we are the root node
       from employees
     where manager_id = 101
     )
;

Contoh untuk simpul akar:

select distinct employee_id, last_name, manager_id 
   from employees
connect by prior employee_id = manager_id -- down the tree
start with manager_id in ( -- list up the tree
     select manager_id 
       from employees
     connect by employee_id = prior manager_id -- up the tree
     start with employee_id = 100
     union 
     select manager_id -- in case we are the root node
       from employees
     where manager_id = 100
     )
;

Biola di http://www.sqlfiddle.com/#!4/d15e7/32