对行进行分组，同时排除特定列上的空值并聚合另一个

Question

我有一张这样的桌子

CUSTOMER_ID	ALIAS_ID	ULTIMATE_NAME	MODEL_SUB_TYPE	OLD_PD	OLD_EXP	OLD_ECAP	RATING
Client A	123	Company A	CI_COM_KN	1	1	1	BB+
Client A	123	Company A	CI_POL_KN	0.5	1	1	null
Client A	456	Company B	CI_COM_KN	1	1	3	BB+
Client A	456	Company B	CI_POL_KN	0.5	1	3	null

我需要我的查询做的是在MODEL_SUB_TYPE = Sub_type B 时忽略OLD_PD、OLD_EXP 和RATING 列中的值，并聚合（求和）OLD_ECAP 列而不考虑MODEL_SUB_TYPE。

到目前为止，我所拥有的是：

SELECT
    CUSTOMER_ID,
    ALIAS_ID,
    SUBSTR(ULTIMATE_NAME, 0, 70) as ULTIMATE_NAME,
    MODEL_SUB_TYPE,
    CASE
        WHEN MODEL_SUB_TYPE LIKE 'CI_COM_%' THEN ULTIMATE_POD
    END AS OLD_PD,
    SUM(
        CASE
            WHEN MODEL_SUB_TYPE LIKE 'CI_COM_%' THEN CREDIT_LIMIT_NET_EXPOSURE
        END
    ) AS OLD_EXP,
    SUM(EC_CONSUMPTION_ND) AS OLD_ECAP,
    ULTIMATE_RATING AS RATING
FROM
    CALC6619.SO_REPORTING -- OLD QUARTER --
WHERE
    MODEL_TYPE LIKE 'IR'
    AND MODEL_SUB_TYPE LIKE 'CI_%'
    AND CUSTOMER_ID = '09781C1 01' -- Customer ID
GROUP BY
    CUSTOMER_ID,
    ALIAS_ID,
    ULTIMATE_NAME,
    MODEL_SUB_TYPE,
    ULTIMATE_POD,
    ULTIMATE_RATING

我想要是我的查询返回这样的表（基于上面的表）：

CUSTOMER_ID	ALIAS_ID	ULTIMATE_NAME	MODEL_SUB_TYPE	OLD_PD	OLD_EXP	OLD_ECAP	RATING
Client A	123	Company A	CI_COM_KN	1	1	2	BB+
Client A	456	Company B	CI_COM_KN	1	1	6	BB+

但它实际上返回了一个类似于第一个表的表，但它应该是空值，但没有按公司 ID 对行进行分组，如下所示：

CUSTOMER_ID	ALIAS_ID	ULTIMATE_NAME	MODEL_SUB_TYPE	OLD_PD	OLD_EXP	OLD_ECAP	RATING
Client A	123	Company A	CI_COM_KN	1	1	1	BB+
Client A	123	Company A	CI_POL_KN	null	null	1	null
Client A	456	Company B	CI_COM_KN	1	1	3	BB+
Client A	456	Company B	CI_POL_KN	null	null	3	null

Answer 1

您只需从group by 中删除列并在SELECT 子句中进行一些更改，如下所示：

SELECT
    CUSTOMER_ID,
    ALIAS_ID,
    SUBSTR(ULTIMATE_NAME, 0, 70) as ULTIMATE_NAME,
    MAX(CASE WHEN MODEL_SUB_TYPE LIKE 'CI_COM_%' THEN MODEL_SUB_TYPE END) AS MODEL_SUB_TYPE,
    SUM(CASE
        WHEN MODEL_SUB_TYPE LIKE 'CI_COM_%' THEN ULTIMATE_POD
    END) AS OLD_PD,
    SUM(
        CASE
            WHEN MODEL_SUB_TYPE LIKE 'CI_COM_%' THEN CREDIT_LIMIT_NET_EXPOSURE
        END
    ) AS OLD_EXP,
    SUM(EC_CONSUMPTION_ND) AS OLD_ECAP,
    MAX(ULTIMATE_RATING) AS RATING
FROM
    CALC6619.SO_REPORTING -- OLD QUARTER --
WHERE
    MODEL_TYPE LIKE 'IR'
    AND MODEL_SUB_TYPE LIKE 'CI_%'
    AND CUSTOMER_ID = '09781C1 01' -- Customer ID
GROUP BY
    CUSTOMER_ID,
    ALIAS_ID,
    SUBSTR(ULTIMATE_NAME, 0, 70)