如何通過

Question

組我有如下表：

我想要得到的三組的年齡（一個和乙的sum | Ç和d | Ë和˚F）

如何CA ñ我這樣做？

Answer 1

WITH sample_data AS 
    (SELECT 1 AS id, 10 AS age, 11 AS name, 'A' AS type FROM dual 
    UNION ALL 
    SELECT 2, 0, 1, 'B' FROM dual 
    UNION ALL 
    SELECT 3, 9, 11, 'C' FROM dual 
    UNION ALL 
    SELECT 4, 10, 11, 'D' FROM dual 
    UNION ALL 
    SELECT 5, 10, 11, 'E' FROM dual 
    UNION ALL 
    SELECT 6, 10, 11, 'F' FROM dual 
) 
SELECT listagg(type,',') within GROUP (
ORDER BY type) types, 
    SUM(age) 
FROM sample_data 
GROUP BY DECODE(type,'A',1,'B',1,'C',2,'D',2,3) 

結果

types sum(age) 
A,B  10 
C,D  19 
E,F  20 

Answer 2

下應該給你你在找什麼：

SELECT CASE 
     WHEN TYPE IN ('A', 'B') THEN 'AB' 
     WHEN TYPE IN ('C', 'D') THEN 'CD' 
     WHEN TYPE IN ('E', 'f') THEN 'Ef' 
     END AS KIND, 
     SUM(AGE) AS TOTAL_AGES 
    FROM WHATEVER_TABLE 
    GROUP BY CASE 
      WHEN TYPE IN ('A', 'B') THEN 'AB' 
      WHEN TYPE IN ('C', 'D') THEN 'CD' 
      WHEN TYPE IN ('E', 'f') THEN 'Ef' 
      END;