一個將聚合值和非聚合值組合在一行中的SQL查詢

Question

以下查詢爲我提供了我需要的信息，但我希望它只是更進一步。在底部的表格中（只顯示字段的子集），我想按cust_line以不尋常的方式進行分組（至少在我看來這是不常見的）。

我們來看一下cust_line爲2的項目爲例。我希望這些代碼不是5行。對於這一行，我想選擇除cust_part =「GROUPINVC」之外的價格字段以外的所有字段。對於總字段，我希望它是'total（total）as new_total'，對於價格，我希望它是new_total/qty_invoiced，其中qty_invoiced是cust_part =「GROUPINV」行上的值。

我要求的是完全荒謬的嗎？它甚至有可能嗎？我在SQL上並不先進，所以它可能也很容易，我只是不知道如何處理它。我想使用'分區'，但我無法想象如何得到它的工作，因爲我認爲它仍然會返回5行，我只想要1 1.

我也看過類似的問題冠軍，但不是真的是我要找：

SQL query that returns aggregate AND non aggregate results

Combined aggregated and non-aggregate query in SQL

SELECT L.CUST_LINE, I.LINE_NO, I.ORDER_NO, I.STAGE, I.ORDER_LINE_POS, I.CUST_PART, 
I.LINE_ITEM_NO, I.QTY_INVOICED, I.CUST_DESC, I.DESCRIPTION, I.SALE_UNIT_PRICE, I.PRICE_TOTAL, 
I.INVOICE_NO, I.CUSTOMER_PO_NO, I.ORDER_NO, I.CUSTOMER_NO, I.CATALOG_DESC, I.ORDER_LINE_NOTES 
FROM 
    (SELECT CUST_LINE, ORDER_NO, LINE_NO 
    FROM CUSTOMER_ORDER_LINE 
    GROUP BY CUST_LINE, ORDER_NO, LINE_NO 
    ) L 
INNER JOIN CUSTOMER_ORDER_IVC_REP I 
ON I.ORDER_NO = L.ORDER_NO 
WHERE RESULT_KEY = 999999 
AND I.LINE_NO = L.LINE_NO 
ORDER BY L.CUST_LINE; 

| cust_line | line_no | cust_part | qty_invoiced | cust_desc | price | total | 
|   1 |  4 |  ... |   1 |  ... | 55 | 55 | 
|   2 |  1 | GROUPINV |   1 | some part |  0 | 0 | 
|   2 |  6 |  ... |   3 |  ... |  0 | 0 | 
|   2 |  2 |  ... |   1 |  ... |  0 | 0 | 
|   2 |  3 |  ... |   1 |  ... |  0 | 0 | 
|   2 |  7 |  ... |   2 |  ... | 10 | 20 | 
|   3 |  7 |  ... |   1 |  ... | 67 | 67 | 

Answer 1

您可以使用分析功能來計算總計超過一個結果集的多個行，然後濾除行你不wa NT。

離開了所有的額外列爲簡潔起見：

SELECT cust_line, qty_invoiced, order_total/qty_invoiced AS price 
FROM (
    SELECT l.cust_line, qty_invoiced, 
    SUM(total) OVER (PARTITION BY l.cust_line) AS order_total, 
    COUNT(cust_line) OVER (PARTITION BY l.cust_line) AS group_count 
    FROM 
    (SELECT CUST_LINE, ORDER_NO, LINE_NO 
    FROM CUSTOMER_ORDER_LINE 
    GROUP BY CUST_LINE, ORDER_NO, LINE_NO 
    ) L 
    INNER JOIN CUSTOMER_ORDER_IVC_REP I 
    ON I.ORDER_NO = L.ORDER_NO 
    WHERE RESULT_KEY = 999999 
    AND I.LINE_NO = L.LINE_NO 
) 
WHERE (cust_part = 'GROUPINV' OR group_count = 1) 
ORDER BY cust_line 

我你想要的PARTITION BY子句中什麼猜測;這本質上是GROUP BY，僅適用於SUM函數。不知道你是否也想在分區中使用order_no。

訣竅是選擇內部查詢中的所有行，將SUM應用於所有行;然後在最外面的查詢中篩選出您不感興趣的行。