ORA-30483：此处不允许使用窗口函数，外部 Select 内部出现错误

Question

我有以下查询，我添加了一个

ROW_NUMBER PARTITION BY

窗口函数，并将其包装在外部 SELECT 语句中。我收到

ORA-30483: window functions are not allowed here

错误。

 (SELECT * FROM 
         (SELECT A.INVENTORY_ITEM_ID
                 ,C.SUBINVENTORY_CODE,
                 TO_CHAR(MAX(B.COST_DATE)) COST_DATE,                             
                 to_char(B.TRANSACTION_COST,'FM99990.90') TRANSACTION_COST
                 ,ROW_NUMBER() OVER (PARTITION BY C.SUBINVENTORY_CODE ORDER BY A.INVENTORY_ITEM_ID, B.COST_DATE DESC) rownum1
                      FROM CST_ONHAND_V A,
                           CST_ITEM_COST_HISTORY_V B,
                           CST_TXN_LAYER_DTLS_V C
                     WHERE 1=1
                       AND A.INVENTORY_ITEM_ID= :p_inv_num
                       AND A.REC_TRXN_ID=B.TRANSACTION_ID
                   
                       AND A.COST_ORG_ID = B.COST_ORG_ID
                       AND A.COST_BOOK_ID = B.COST_BOOK_ID
                       AND A.INVENTORY_ITEM_ID=B.INVENTORY_ITEM_ID                      
                             
                       AND A.REC_TRXN_ID=C.REC_TRXN_ID                        
               GROUP BY A.INVENTORY_ITEM_ID
                   ,C.SUBINVENTORY_CODE                             
                   ,to_char(B.TRANSACTION_COST,'FM99990.90')
                   ,ROW_NUMBER() OVER (PARTITION BY C.SUBINVENTORY_CODE ORDER BY A.INVENTORY_ITEM_ID, B.COST_DATE DESC )
                        
    ORDER BY COST_DATE DESC NULLS LAST
    ) 
    WHERE rownum1 = 1  AND TRANSACTION_COST IS NOT NULL )

Answer 1

根据您的评论，INVENTORY_ITEM_ID 和 SUBINVENTORY_CODE 需要最长日期 (COST_DATE)，

INVENTORY_ITEM_ID 可以包含在partition by 子句中，并可以从group_by 子句中删除ROW_NUMBER。

SELECT * FROM (
    SELECT 
        A.INVENTORY_ITEM_ID,
        C.SUBINVENTORY_CODE,
        TO_CHAR(MAX(B.COST_DATE)) COST_DATE,
        TO_CHAR(MAX(B.TRANSACTION_COST), 'FM99990.90') TRANSACTION_COST,
        ROW_NUMBER() OVER (PARTITION BY A.INVENTORY_ITEM_ID, C.SUBINVENTORY_CODE ORDER BY B.COST_DATE DESC) AS rownum1
    FROM 
        CST_ONHAND_V A
    INNER JOIN CST_ITEM_COST_HISTORY_V B ON A.REC_TRXN_ID = B.TRANSACTION_ID
                                        AND A.COST_ORG_ID = B.COST_ORG_ID
                                        AND A.COST_BOOK_ID = B.COST_BOOK_ID
                                        AND A.INVENTORY_ITEM_ID = B.INVENTORY_ITEM_ID
    INNER JOIN CST_TXN_LAYER_DTLS_V C ON A.REC_TRXN_ID = C.REC_TRXN_ID
    WHERE A.INVENTORY_ITEM_ID = :p_inv_num
    GROUP BY A.INVENTORY_ITEM_ID, C.SUBINVENTORY_CODE
    ORDER BY COST_DATE DESC NULLS LAST
)
WHERE rownum1 = 1 AND TRANSACTION_COST IS NOT NULL;