Order By on Abfrage in Oracle

Question

Ich möchte Abfrage in Order By-Klausel verwenden, ist dies möglich ...?

select s.staff_list_pk, s.staff_name, Designation_fn(s.designation_fk) 
Designation, s.bps, Department_fn(s.department_fk) Department 
from staff_list s 
where s.RESERVE = 'N' and s.INTEREST = 'I' 
and s.bps in (18,19,20) 
and s.department_fk in (select department_fk from perority_dept 
where `et_blcok = 'Comp. Engg.') 
and s.staff_list_pk not in (select staff_list_fk from SUPERINTENDENT) 
order by (select perority from perority_dept where et_blcok = 'Comp. Engg.'), s.bps desc; 

Answer 1

Dies sollte funktionieren. Bitte versuchen Sie es einmal.

with xyz as (SELECT department_fk ,perority 
           FROM perority_dept 
           WHERE et_blcok = 'Comp. Engg.'), 

    klm as (select staff_list_fk 
      from SUPERINTENDENT)       

SELECT s.staff_list_pk, 
     s.staff_name, 
     Designation_fn (s.designation_fk) Designation, 
     s.bps, 
     Department_fn (s.department_fk) Department 
    FROM staff_list s , xyz x ,klm k 
WHERE  s.RESERVE = 'N' 
     AND s.INTEREST = 'I' 
     AND s.bps IN (18, 19, 20) 
     AND s.department_fk = x.department_fk          
     and s.staff_list_pk <> k.staff_list_fk 
     order by xyz.perority,s.bps desc;