查询从同一个表中减去列值答案

【问题标题】：Query to subtract the column value from same table查询从同一个表中减去列值
【发布时间】：2020-01-02 21:02:56
【问题描述】：

我通过以下查询得到以下输出。

SELECT TOTAL_ACTUAL_COST,SHIPMENT_GID, PERSPECTIVE
FROM SHIPMENT
WHERE SHIPMENT_GID IN
   (SELECT SHIPMENT_GID FROM SHIPMENT_STOP_D
    WHERE S_SHIP_UNIT_GID IN
        (SELECT S_SHIP_UNIT_GID FROM S_SHIP_UNIT_LINE
         WHERE ORDER_RELEASE_GID LIKE :ORDER_RELEASE_ID))

当我将 Order_Release_ID 作为 CT/PLI.KIKO3 传递时，我得到如下输出。

我想要一个字段作为利润（透视为“S”的总实际成本 - 透视为“B”的总实际成本），即在上述情况下，它将是（5980 -1020 = 4960）

请让我知道我需要在上述查询中进行哪些更改才能获得利润字段。

我真正想要的是从同一个表中减去列值。

【问题讨论】：

标签： sql oracle

【解决方案1】：

您可以使用conditional aggregation，如下：

SELECT
    SUM(CASE WHEN PERSPECTIVE = 'S' THEN TOTAL_ACTUAL_COST
    END) - SUM(CASE
        WHEN PERSPECTIVE = 'B' THEN TOTAL_ACTUAL_COST
    END) AS PROFIT,
    SHIPMENT_GID, 
    --PERSPECTIVE, 
    ORDER_RELEASE_ID
FROM SHIPMENT
WHERE SHIPMENT_GID IN
   (SELECT SHIPMENT_GID FROM SHIPMENT_STOP_D
    WHERE S_SHIP_UNIT_GID IN
        (SELECT S_SHIP_UNIT_GID FROM S_SHIP_UNIT_LINE
         WHERE ORDER_RELEASE_GID LIKE :ORDER_RELEASE_ID))
GROUP BY SHIPMENT_GID, ORDER_RELEASE_ID

干杯！！

【讨论】：

【解决方案2】：

我不能说我是嵌套IN 逻辑的粉丝，所以我倾向于使用JOIN 和EXISTS 来写这篇文章。

那么，如果你想要每个ORDER_RELEASE_ID 一行，那么条件聚合：

SELECT s.ORDER_RELEASE_ID,
       SUM(CASE WHEN s.Perspective = 'S' THEN s.TOTAL_ACTUAL_COST
                WHEN s.Perspective = 'B' THEN - s.SHIPMENT_GID
           END) as Profit
FROM SHIPMENT s
WHERE EXISTS (SELECT 1
              FROM SHIPMENT_STOP_D ss JOIN
                   S_SHIP_UNIT_LINE sul
                   USING (S_SHIP_UNIT_GID)
              WHERE s.SHIPMENT_GID = ss.SHIPMENT_GID AND
                    sul.ORDER_RELEASE_GID LIKE :ORDER_RELEASE_ID
             )
GROUP BY s.ORDER_RELEASE_ID;

如果您想要原始行以及额外的“利润”列，请使用分析函数：

SELECT s.*,
       SUM(CASE WHEN s.Perspective = 'S' THEN s.TOTAL_ACTUAL_COST
                WHEN s.Perspective = 'B' THEN - s.SHIPMENT_GID
           END) OVER (PARTITION BY s.ORDER_RELEASE_ID) as Profit
FROM SHIPMENT s
WHERE EXISTS (SELECT 1
              FROM SHIPMENT_STOP_D ss JOIN
                   S_SHIP_UNIT_LINE sul
                   USING (S_SHIP_UNIT_GID)
              WHERE s.SHIPMENT_GID = ss.SHIPMENT_GID AND
                    sul.ORDER_RELEASE_GID LIKE :ORDER_RELEASE_ID
             );

【讨论】：

【解决方案3】：

试试这个

/* here goes your initial query from the question */
WITH src AS (SELECT TOTAL_ACTUAL_COST,SHIPMENT_GID, PERSPECTIVE
FROM SHIPMENT
WHERE SHIPMENT_GID IN (SELECT SHIPMENT_GID 
FROM SHIPMENT_STOP_D
WHERE S_SHIP_UNIT_GID IN
(SELECT S_SHIP_UNIT_GID FROM S_SHIP_UNIT_LINE
WHERE ORDER_RELEASE_GID LIKE :ORDER_RELEASE_ID))

select src_s.total_actual_cost - src_b.total_actual_cost
/* here any other fields you need */
from src src_b,
src src_s
where src_s.order_release_id = src_b.order_release_id
and src_b.PERSPECTIVE = 'B'
and src_s.PERSPECTIVE = 'S'

【讨论】：