[英]CASE WHEN expressions with NULL values (Hiveql)
我有以下查詢:
SELECT
rv.country
, coalesce(rv.client_id, client_id2) as AccountID
, coalesce(c.name, rv.client_id2) as AccountName
, rv.prod_type as ProdType,
CASE WHEN cs.prod_type IS NULL THEN 'Unknown' ELSE cs.prod_type END as ProdType1,
ROUND(-SUM(CASE WHEN DATEDIFF(current_date(), rv.date_time) < 90 THEN rv.sold_prods END)) as Last3Months,
ROUND(-SUM(CASE WHEN DATEDIFF(current_date(), rv.date_time) < 180 THEN rv.sold_prods END)) as Last6Months,
ROUND(-SUM(CASE WHEN DATEDIFF(current_date(), rv.date_time) < 360 THEN rv.sold_prods END)) as Last12Months
FROM
commercial.sold_products rv
LEFT JOIN commercial.customer c
ON c.client_id2 = rv.client_id
LEFT JOIN
commercial.customer_description cs
ON
cs.clientid = c.client_id2
WHERE rv.country NOT IN ('US', 'JP')
AND cs.prod_type = rv.prod_type
GROUP BY
rv.country
, rv.client_id
, rv.client_id2
, cs.prod_type
, c.name
, rv.prod_type;
我有 3 個 CASE WHEN 語句應該代表過去 3、6 和 12 個月內售出的產品數量。 然而,一些客戶出現 NULL 值,即使我知道我們在 22 天前向他們出售了產品(示例)。
我不確定這個查詢有什么問題,所以如果你發現了什么,請告訴我!
還! 忽略列/表名稱,因為公司隱私問題,我更改了它們。 謝謝:)
像這樣更改您的查詢:
SELECT
rv.country
, coalesce(rv.client_id, client_id2) as AccountID
, coalesce(c.name, rv.client_id2) as AccountName
, rv.prod_type as ProdType,
CASE WHEN cs.prod_type IS NULL THEN 'Unknown' ELSE cs.prod_type END as ProdType1,
ROUND(-SUM(CASE WHEN DATEDIFF(current_date(), rv.date_time) < 90 THEN rv.sold_prods END)) as Last3Months,
ROUND(-SUM(CASE WHEN DATEDIFF(current_date(), rv.date_time) < 180 THEN rv.sold_prods END)) as Last6Months,
ROUND(-SUM(CASE WHEN DATEDIFF(current_date(), rv.date_time) < 360 THEN rv.sold_prods END)) as Last12Months
FROM
commercial.sold_products rv
LEFT JOIN commercial.customer c
ON c.client_id2 = rv.client_id
LEFT JOIN
commercial.customer_description cs
ON
cs.clientid = c.client_id2 AND cs.prod_type = rv.prod_type
WHERE rv.country NOT IN ('US', 'JP')
GROUP BY
rv.country
, coalesce(rv.client_id, rv.client_id2)
, rv.client_id2
, cs.prod_type
, coalesce(c.name, rv.client_id2)
, rv.prod_type;
如果不正確,您可以共享一些示例數據進行檢查,我認為您應該按項目關注您的分組。
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