Question

祝大家好。我可以执行以下代码并在oracle中获得正确的输出。但是当尝试创建视图时给出错误-列可能未加入子查询。该视图是在SQL Server上的同一查询中创建的，但在oracle中却给出了错误。请提供帮助。

select c.Contractid
FROM    FCT_EIT_CONTRACT c LEFT OUTER JOIN
DIM_EIT_PROCESS_INSTANCE psi   ON psi.SURR_ID = c.PROCESS_INSTANCE_SKEY 
    LEFT OUTER JOIN                 
    DIM_EIT_ACTION wa               ON psi.ACTION_SKEY wa.SURR_ID 
    LEFT OUTER JOIN         
    DIM_EIT_ACTION_HISTORY  ah      ON wa.SURR_ID = ah.ACTION_SKEY 

    AND psi.SURR_ID = ah.PROCESS_INSTANCE_SKEY 
    AND ah.ACTION_HISTORY_ID =(SELECT  MAX(ACTION_HISTORY_ID) AS Expr1
   FROM  DIM_EIT_ACTION_HISTORY  a
   WHERE (PROCESS_INSTANCE_SKEY = c.PROCESS_INSTANCE_SKEY) 
   AND 
  (psi.ACTION_SKEY = ACTION_SKEY)))  
  LEFT OUTER JOIN
 DIM_EIT_STEP ws ON ws.SURR_ID = wa.NEXT_STEP_SKEY
 WHERE (psi.CurrentStepId NOT IN (100, 130, 131, 132, 900, 902, 910))

Answer 1

如果将查询中有问题的部分移至WHERE子句，例如

，会有所帮助

SELECT c.contractid
FROM fct_eit_contract c
LEFT OUTER JOIN dim_eit_process_instance psi ON psi.surr_id = c.process_instance_skey
LEFT OUTER JOIN dim_eit_action wa            ON psi.action_skey wa.surr_id
LEFT OUTER JOIN dim_eit_action_history ah    ON wa.surr_id = ah.action_skey
                                            AND psi.surr_id = ah.process_instance_skey
LEFT OUTER JOIN dim_eit_step ws              ON ws.surr_id = wa.next_step_skey
WHERE psi.currentstepid NOT IN (100, 130, 131, 132, 900, 902, 910)
  -- subquery moved down here
  AND  ah.action_history_id = (SELECT MAX(action_history_id) AS expr1
                               FROM dim_eit_action_history a
                               WHERE process_instance_skey = c.process_instance_skey
                                 AND psi.action_skey = action_skey
                              );

Answer 2

select

c.contractid 从FCT_EIT_CONTRACT c，DIM_EIT_PROCESS_INSTANCE psi，DIM_EIT_ACTION wa，DIM_EIT_ACTION_HISTORY啊，（通过ACTION_SKEY，PROCESS_INSTANCE_SKEY从DIM_EIT_ACTION_HISTORY组中选择MAX（ACTION_HISTORY_ID）AS ACTION_HISTORY_ID，ACTION_SKEY，PROCESS_INSTANCE_SKEY）a， DIM_EIT_STEP ws 其中psi.SURR_ID（+）= c.PROCESS_INSTANCE_SKEY 和psi.ACTION_SKEY = wa.SURR_ID（+）和wa.SURR_ID = ah.ACTION_SKEY（+） AND psi.SURR_ID = ah.PROCESS_INSTANCE_SKEY（+） AND ah.ACTION_HISTORY_ID = a.ACTION_HISTORY_ID（+）和（（（a.ACTION_HISTORY_ID不为空，而ah.ACTION_HISTORY_ID不为空，而ah.PROCESS_INSTANCE_SKEY不为空）或（a.ACTION_HISTORY_ID为空，而ah.ACTION_HISTORY_ID为空，而ah.PROCESS_INSTANCE_SKEY为空）） -和 -和c.PROCESS_INSTANCE_SKEY = a.PROCESS_INSTANCE_SKEY（+） -和psi.ACTION_SKEY = a.ACTION_SKEY 和ws.SURR_ID` +）= wa.NEXT_STEP_SKEY 和（psi.CurrentStepId NOT IN（100，130，131，132，900，902，910））和Contractid in（1313,27，221）

无法在以下查询上创建实例化视图

2 个答案: