Teradata SQL扩展+累积

我有登机资料，随着时间的推移计算身份证。我已经扩展了数据，但我还需要积累

我有：

ONBOARDING_DATE ONBOARDED ONBOARDED_EXPANDED
12/06/2018                          
13/06/2018                          
14/06/2018            2            2
15/06/2018                         2
17/06/2018                         2
18/06/2018            5            5
19/06/2018                         5
20/06/2018                         5

我需要它的积累，因为更多的ID正在板上，但无法找到正确的功能，将与扩展相结合

ONBOARDING_DATE ONBOARDED ONBOARDED_EXPANDED_ACCUMULATED
12/06/2018                        
13/06/2018                        
14/06/2018            2            2
15/06/2018                         2
17/06/2018                         2
18/06/2018            5            7
19/06/2018                         7
20/06/2018                         7

我的剧本

SELECT 

a.ONBOARDING_DATES
, b.ONBOARDED
, SUM(ONBOARDED) OVER ( PARTITION BY 1
                    ORDER BY ONBOARDING_DATE ASC
                    RESET WHEN ONBOARDED<>0 ) AS ONBOARDED_EXPANDED

FROM

        (
        SELECT 

        CAST(CALENDAR_DATE AS DATE) AS ONBOARDING_DATES FROM 
SYS_CALENDAR.CALENDAR

        WHERE ONBOARDING_DATES BETWEEN ADD_MONTHS(CURRENT_DATE, - 9)  AND ADD_MONTHS(CURRENT_DATE, + 9)

        ) a

LEFT JOIN
    (

            SELECT DISTINCT

            COUNT(ID) AS ONBOARDED
            , WAVE_DATE

            FROM ENV0.R_ONBOARDING

            WHERE WAVE_DATE IS NOT NULL

            GROUP BY WAVE_DATE

    ) b

    ON a.ONBOARDING_DATS = b.WAVE_DATE

    ORDER BY a.ONBOARDING_DATE

---

谢谢您的帮助。

您似乎只想要一笔累计金额：

select ONBOARDING_DATE, ONBOARDED,
       sum(onboarded) over (order by onboarding_date rows between unbounded preceding and current row) as ONBOARDED_EXPANDED
from t;

---

您似乎只想要一个累积的总和：

select ONBOARDING_DATE, ONBOARDED,
       sum(onboarded) over (order by onboarding_date rows between unbounded preceding and current row) as ONBOARDED_EXPANDED
from t;

您的重置时间可以使用LAST_值加上IGNORE NULLS重写，这将导致解释中的一个统计步骤而不是两个。如果您想计算已加载的扩展和已加载的扩展累积，您也可以在一个步骤中组合它们：

SELECT 
   a.ONBOARDING_DATES
   ,b.ONBOARDED
   ,SUM(ONBOARDED) 
    OVER (ORDER BY ONBOARDING_DATE ASC
          ROWS UNBOUNDED PRECEDIND) AS ONBOARDED_EXPANDED
   ,LAST_VALUE(ONBOARDED IGNORE NULLS) 
    OVER (ORDER BY ONBOARDING_DATE ASC
          ROWS UNBOUNDED PRECEDIND) AS ONBOARDED_EXPANDED_ACCUMULATE

相同的分区，相同的顺序将这两个计算组合成一个步骤。

可以使用最后一个值加上忽略空值重写重置时间，这将导致解释中的一个统计步骤而不是两个。如果您想计算已加载的扩展和已加载的扩展累积，您也可以在一个步骤中组合它们：

SELECT 
   a.ONBOARDING_DATES
   ,b.ONBOARDED
   ,SUM(ONBOARDED) 
    OVER (ORDER BY ONBOARDING_DATE ASC
          ROWS UNBOUNDED PRECEDIND) AS ONBOARDED_EXPANDED
   ,LAST_VALUE(ONBOARDED IGNORE NULLS) 
    OVER (ORDER BY ONBOARDING_DATE ASC
          ROWS UNBOUNDED PRECEDIND) AS ONBOARDED_EXPANDED_ACCUMULATE

---

相同的分区、相同的顺序将这两个计算合并到一个步骤中。

已解决！谢谢，解决了！谢谢