Oracle 再下去。因此，您将从'382418'和向下再加上一级。但您最初的需求是要一直走下去（不管有多少层），然后一直走下去，我认为我的查询实现了这一点。 WITH WO(WONUM, PARENT) AS ((SELECT X.WONUM,

再下去。因此，您将从

'382418'

和向下再加上一级。但您最初的需求是要一直走下去（不管有多少层），然后一直走下去，我认为我的查询实现了这一点。

WITH WO(WONUM,
PARENT) AS
((SELECT X.WONUM,
                  X.PARENT
        FROM (SELECT R.RECORDKEY WONUM,
                                    R.RELATEDRECKEY PARENT
                        FROM MAXIMO.RELATEDRECORD R
                        WHERE R.RELATEDRECKEY = '382418'
                    UNION ALL
                    SELECT W.WONUM,
                                    W.PARENT
                        FROM MAXIMO.WORKORDER W
                        START WITH W.PARENT = '382418'
                    CONNECT BY PRIOR W.WONUM = W.PARENT) X) 
           UNION ALL 
  SELECT W.WONUM, W.PARENT FROM MAXIMO.WORKORDER W, WO WHERE W.WONUM = WO.PARENT)
SELECT DISTINCT WONUM FROM WO;