Oracle SQL - 在 Group By 中使用子查询

Question

我有两个单独运行良好的查询，我需要将它们组合起来。一个查询使用“Group By”，另一个查询使用子查询。

第一个查询：

SELECT
    LH.AISLE AS "Aisle",
    LH.DSP_LOCN AS "Location",
    WI.TC_LPN_ID AS "iLPN",
    IC.ITEM_NAME AS "Item",
    WI.ON_HAND_QTY AS "Qty",
    (SELECT
        SUM(OLI.ORDER_QTY)
    FROM 
            ORDERS O,
            ORDER_LINE_ITEM OLI
    WHERE
        O.ORDER_ID = OLI.ORDER_ID
    AND
            O.DO_STATUS = 110
    AND
            OLI.ITEM_ID = IC.ITEM_ID) AS "Released Qty"
FROM
    WM_INVENTORY WI,
    LOCN_HDR LH,
    ITEM_CBO IC
WHERE
    WI.LOCATION_ID = LH.LOCN_ID
AND
    WI.ITEM_ID = IC.ITEM_ID
AND
    LH.ZONE = 'R'
AND
    LH.LVL = '20'
ORDER BY
    LH.DSP_LOCN;

第二个查询：

SELECT
    LH.AISLE AS "Aisle",
    LH.DSP_LOCN AS "Location",
    WI.TC_LPN_ID AS "iLPN",
    IC.ITEM_NAME AS "Item",
    WI.ON_HAND_QTY AS "Qty",
    SUM (WI2.ON_HAND_QTY) AS "CP Qty"
FROM
    LOCN_HDR LH,
    WM_INVENTORY WI,
    ITEM_CBO IC
    LEFT JOIN WM_INVENTORY WI2
    ON (WI2.ITEM_ID = IC.ITEM_ID AND WI2.LOCN_CLASS = 'C')
WHERE
    WI.LOCATION_ID = LH.LOCN_ID
AND
    WI.ITEM_ID = IC.ITEM_ID
AND
    LH.ZONE = 'R'
AND
    LH.LVL = '20'
GROUP BY
    LH.AISLE,
    LH.DSP_LOCN,
    WI.TC_LPN_ID,
    IC.ITEM_NAME,
    WI.ON_HAND_QTY
ORDER BY
    LH.DSP_LOCN;

我不知道如何将子查询添加到组中，以便它们一起工作。

Answer 1

如果两个查询都正常工作并返回您需要的数据，一个简单的选择是使用

UNION

集合运算符。

简化

select ... from ... where ... --> the 1st query
union all
select ... from ... where ... --> the 2nd query

使用您的代码：

SELECT
    LH.AISLE AS "Aisle",
    LH.DSP_LOCN AS "Location",
    WI.TC_LPN_ID AS "iLPN",
    IC.ITEM_NAME AS "Item",
    WI.ON_HAND_QTY AS "Qty",
    (SELECT
        SUM(OLI.ORDER_QTY)
    FROM 
            ORDERS O,
            ORDER_LINE_ITEM OLI
    WHERE
        O.ORDER_ID = OLI.ORDER_ID
    AND
            O.DO_STATUS = 110
    AND
            OLI.ITEM_ID = IC.ITEM_ID) AS "Released Qty"
FROM
    WM_INVENTORY WI,
    LOCN_HDR LH,
    ITEM_CBO IC
WHERE
    WI.LOCATION_ID = LH.LOCN_ID
AND
    WI.ITEM_ID = IC.ITEM_ID
AND
    LH.ZONE = 'R'
AND
    LH.LVL = '20'
--
UNION ALL
--
SELECT
    LH.AISLE AS "Aisle",
    LH.DSP_LOCN AS "Location",
    WI.TC_LPN_ID AS "iLPN",
    IC.ITEM_NAME AS "Item",
    WI.ON_HAND_QTY AS "Qty",
    SUM (WI2.ON_HAND_QTY) AS "CP Qty"
FROM
    LOCN_HDR LH,
    WM_INVENTORY WI,
    ITEM_CBO IC
    LEFT JOIN WM_INVENTORY WI2
    ON (WI2.ITEM_ID = IC.ITEM_ID AND WI2.LOCN_CLASS = 'C')
WHERE
    WI.LOCATION_ID = LH.LOCN_ID
AND
    WI.ITEM_ID = IC.ITEM_ID
AND
    LH.ZONE = 'R'
AND
    LH.LVL = '20'
GROUP BY
    LH.AISLE,
    LH.DSP_LOCN,
    WI.TC_LPN_ID,
    IC.ITEM_NAME,
    WI.ON_HAND_QTY
ORDER BY 2;

请注意，两个查询都必须返回相同数量的列（显然，它们确实如此），这些列必须在数据类型中匹配（无法确定，因为我没有您的表及其描述，但您应该知道） .

从

order by

子句开始：它仅出现在整个代码的末尾（这就是为什么在第一个查询之后没有

order by

）。