집계 함수가없는 피벗 또는 Oracle 그룹의 행 대 행

Question

행을 행 유형별로 행을 열로 변환하려고합니다.
는 여기 된 table_1 Table_1

  Table_1 
CITY   AMOUNT  TYPE_ID 
Moscow   158000   1 
New York  94500   1 
Moscow   1478000   2 
Los Angeles 162000   2 
New York  5500000   2 
Los Angeles 35400   1 
Moscow   741200   1 

를 부여하고 결과에서 선택 스크립트 내가 PIVOT과 노력 Table_2 Table_2에서

  Table_2 
CITY   TYPE_1_AMOUNT  TYPE_2_AMOUNT 
Moscow   158000    1478000 
Moscow   741200     NULL 
New York   94500    5500000 
Los Angeles  35400    162000 

처럼 먹고 싶어. 하지만 집계 함수가 있어야합니다.
집계 함수 MAX() 단지 최대 양을 읽어 ...

Answer 1

select  city 
      ,min (case type_id when 1 then amount end) as type_1_amount 
      ,min (case type_id when 2 then amount end) as type_2_amount 

from  (select  city,type_id,amount 

         ,row_number() over 
         (
          partition by city,type_id 
          order by  amount 
         ) as rn 

      from  Table_1 
      ) 

group by city 
      ,rn 

order by city 
      ,rn    

오라클 11.1에서

---

+-------------+---------------+---------------+ 
| CITY  | TYPE_1_AMOUNT | TYPE_2_AMOUNT | 
+-------------+---------------+---------------+ 
| Los Angeles | 35400   | 162000  | 
+-------------+---------------+---------------+ 
| Moscow  | 158000  | 1478000  | 
+-------------+---------------+---------------+ 
| Moscow  | 741200  | (null)  | 
+-------------+---------------+---------------+ 
| New York | 94500   | 5500000  | 
+-------------+---------------+---------------+ 

Answer 2

이상, 당신은 PIVOT 연산자와 동일 할 수있다 - 그러나 첫째로 당신은 행을 구별해야 어쨌든 row_number()과 같은 것으로 (Dudu의 솔루션과 동일). PIVOT 솔루션은 다음과 같습니다

with 
    table_1 (city, amount, type_id) as (
     select 'Moscow'  , 158000, 1 from dual union all 
     select 'New York' , 94500, 1 from dual union all 
     select 'Moscow'  , 1478000, 2 from dual union all 
     select 'Los Angeles', 162000, 2 from dual union all 
     select 'New York' , 5500000, 2 from dual union all 
     select 'Los Angeles', 35400, 1 from dual union all 
     select 'Moscow'  , 741200, 1 from dual 
    ) 
-- end of test data; SQL query begins below this line 
select city, type_1, type_2 
from (select city, amount, type_id, 
       row_number() over (partition by city, type_id order by amount) as rn 
     from table_1 
     ) 
pivot (min(amount) for type_id in (1 as type_1, 2 as type_2)) 
order by city, type_1, type_2 -- ORDER BY is optional 
; 

CITY   TYPE_1  TYPE_2 
----------- ---------- ---------- 
Los Angeles  35400  162000 
Moscow   158000 1478000 
Moscow   741200 
New York   94500 5500000 

4 rows selected.