Oracle/SQL多个真实案例陈述

Question

我试图显示SC，DC，DV对每个员工的工作人员，每个人都可以有一个或多个选择，例如eng 1可以有sc和dc。

所以需要得到

但

我使用情况来设置列和数据获取，但不能得到在同一行的数据

SELECT DISTINCT e.ENG_ID, 
      e.NAME, 
      e.SURNAME, 
      e.POST_CODE, 
      CASE 
       WHEN C.CLEARANCE_ID = 1 THEN 'YES' 
       ELSE 'NO' 
      END AS SC, 
      CASE 
       WHEN C.CLEARANCE_ID = 2 THEN 'YES' 
       ELSE 'NO' 
      END AS BS, 
      CASE 
       WHEN C.CLEARANCE_ID = 3 THEN 'YES' 
       ELSE 'NO' 
      END AS DV 
FROM MAN_ENGINEERS e 
    left join MAN_CLEARANCE c 
      ON e.ENG_ID = c.ENG_ID; 

希望这样做在这些列感

Answer 1

利用最高，试试这个

SELECT  e.ENG_ID, 
      e.NAME, 
      e.SURNAME, 
      e.POST_CODE, 
      MAX 
      (
       CASE 
       WHEN C.CLEARANCE_ID = 1 THEN 'YES' 
       ELSE 'NO' 
       END 
      ) AS SC, 
      MAX 
      (
       CASE 
       WHEN C.CLEARANCE_ID = 2 THEN 'YES' 
       ELSE 'NO' 
       END 
      ) AS BS, 
      MAX 
      (
       CASE 
       WHEN C.CLEARANCE_ID = 3 THEN 'YES' 
       ELSE 'NO' 
       END 
      ) AS DV 
FROM MAN_ENGINEERS e 
    left join MAN_CLEARANCE c 
      ON e.ENG_ID = c.ENG_ID 
GROUP BY e.ENG_ID, 
      e.NAME, 
      e.SURNAME, 
      e.POST_CODE, ;