sql - Oracle PIVOT，两次？

Question

我一直在尝试在 Oracle 11g 中不再使用 DECODE 来透视行，其中有一个方便的 PIVOT 函数。但我可能发现了一个限制:

我尝试为基表中的每个值返回 2 列。像这样的东西:

SELECT somethingId, splitId1, splitName1, splitId2, splitName2
FROM (SELECT somethingId, splitId
      FROM SOMETHING JOIN SPLIT ON ... )
      PIVOT ( MAX(splitId) FOR displayOrder IN (1 AS splitId1, 2 AS splitId2),
              MAX(splitName) FOR displayOrder IN (1 AS splitName1, 2 as splitName2)
            )

我可以用 DECODE 来做到这一点，但我无法通过语法来让我用 PIVOT 来做到这一点。这可能吗？看来这个函数处理起来并不太难。

编辑:StackOverflow 是否可能不是 SQL 问题的正确溢出？

编辑:有人在吗？

Answer 1

来自oracle-developer.net看来可以这样做:

SELECT somethingId, splitId1, splitName1, splitId2, splitName2
FROM (SELECT somethingId, splitId
      FROM SOMETHING JOIN SPLIT ON ... )
      PIVOT ( MAX(splitId)  ,
              MAX(splitName) 
              FOR displayOrder IN (1 AS splitName1, 2 as splitName2)
            )