雪花中的SQL查询 - 计算供应天数

Question

<= (200+300+100) equal 3 days on 1/23/2025. 600 <= (300+100) equal 2 days

-location材料 -start_date1234561/23/20251/24/20251/25/20251/26/20251/27/2025

inventory	forecast			W01
700	400		W01	123456
600	200		W01	123456
400	300		W01	123456
450	100		W01	123456
50	300			输出

-location

材料 -start_date inventory1/23/202570060040045050 我的查询不起作用

SELECT 
    "A"."LOCATION",
    "A"."MATERIAL", 
    "A"."START_DATE", 
    "A"."INVENTORY", 
    "A"."FORECAST",

(SELECT SUM("B"."FORECAST")
FROM "B"
WHERE "B"."START_DATE" >= "A"."START_DATE" ) AS "FUTURE_DEMAND",

CASE
    WHEN (SELECT SUM("B"."FORECAST")
        FROM "B"
        WHERE "B"."START_DATE" >= "A"."START_DATE ) = 0 THEN NULL
    ELSE "A"."INVENTORY" /
        (SELECT SUM ("B"."FORECAST")
            FROM "B"
            WHERE "B"."START_DATE" >= "A"."START_DATE 

END AS "DOS"

FROM "A" 
ORDER BY 
    "A"."START_DATE"

在您的输出中，因为

forecast	dos			W01	123456
400	3		W01	123456	1/24/2025
200	2		W01	123456	1/25/2025
300	2		W01	123456	1/26/2025
100	2		W01	123456	1/27/2025
300	0

1/26/2025

dos不应是2是1天

I已通过递归将锚定为0 dos的递归对其进行，然后比较后续日期的每一行，直到预测的总和> = = = = = = = =。

在外部查询中，所有列都通过连接DOS_CTE和表格与DOS一起获取。

1/26/2025

Answer 1