一个月内重新激活

如何解决一个月内重新激活

我需要找到已重新激活一个月的用户。先前已开具发票，然后停止开具发票，然后在该月再次开始开具发票的用户数。下面的查询给了我一个月的期望结果。

    SELECT COUNT(DISTINCT USERID)
    FROM (
        SELECT USERID,MIN(DATE ( INVOICE_DT)) AS ADD_ON_GA_DATE
        FROM INVOICE_D AS ID
        WHERE 
        USERID IN (
                    (
                    SELECT USERID
                    FROM INVOICE_D AS ID
                    WHERE INVOICE_AMT > 0
                    AND LAST_DAY(INVOICE_DT) = ADD_MONTHS(LAST_DAY(CURRENT_DATE - 1),- 1)
                    GROUP BY USERID
                    ) 
                    MINUS
                   (SELECT USERID
                    FROM INVOICE_D AS ID
                    WHERE LAST_DAY(INVOICE_DT)  = ADD_MONTHS(LAST_DAY(CURRENT_DATE - 1),- 2) 
                    GROUP BY USERID)
                  )
        GROUP BY USERID
        ) AS TOTAL_POP
    WHERE LAST_DAY(ADD_ON_GA_DATE) != ADD_MONTHS(LAST_DAY(CURRENT_DATE - 1),- 1)
   ;

我希望此查询计算除当前月份（2020年9月除外）以外的所有月份。这为我提供了所有月份的数据，其中用户在当月而不是上个月处于活动状态。现在，从该列表中，我只希望那些在所有较旧月份以及当前月份都处于活动状态的用户。不确定在哪里需要添加过滤器以排除当前月份。

WITH MONTH_SUMMARY AS 
(
  SELECT USERID,TO_CHAR(INVOICE_DT,'YYYY-MM') "INVOICE_MONTH",TO_CHAR(ADD_MONTHS(INVOICE_DT,-1),'YYYY-MM') "PREV_MONTH",SUM(INVOICE_AMT) "MONTHLY_TOTAL"
  FROM INVOICE_DATA
  WHERE INVOICE_DT >= TRUNC(ADD_MONTHS(current_date(),-13),'MONTH') 
  GROUP BY 1,2,3
),USER_DATA AS 
  (
  SELECT USERID,INVOICE_MONTH,MONTHLY_TOTAL
  FROM MONTH_SUMMARY MS_THIS
  WHERE NOT EXISTS 
  (
    SELECT USERID
    FROM MONTH_SUMMARY MS_NEXT
    WHERE 
      MS_THIS.USERID = MS_NEXT.USERID AND
      MS_THIS.NEXT_MONTH = MS_NEXT.INVOICE_MONTH
   )
   AND MS_THIS.INVOICE_MONTH < TO_CHAR(current_date(),'YYYY-MM') 
)
SELECT INVOICE_MONTH,COUNT(DISTINCT USERID) "USER_COUNT"
FROM USER_DATA
GROUP BY INVOICE_MONTH
ORDER BY INVOICE_MONTH
 ;
 

解决方法

此SQL可能应该使您接近所需的内容：

-- Create a CTE that holds monthly summaries per user; adjust as necessary to hold the data required in the final output
-- Last day of month used,rather than just the month,to make subsequent date logic easier
WITH MONTHLY_SUMMARY AS (
    SELECT USERID,LAST_DAY(INVOICE_DT) AS INVOICE_MONTH,SUM(INVOICE_AMT) MONTHLY_AMT
    FROM INVOICE_D    
    GROUP BY 1,2
    HAVING MONTHLY_AMT > 0 -- Only include user/month combinations that have an invoice amount. Only required if zero-value invoices exists. Would need adjusting if +ve and -ve amounts exist that could sum to zero

)
--Main select
SELECT THIS_MONTH.INVOICE_MONTH,THIS_MONTH.USERID,THIS_MONTH.MONTHLY_AMT
FROM MONTHLY_SUMMARY THIS_MONTH
WHERE NOT EXISTS ( -- exclude records where there is an invoice amount for the same user in the previous month
    SELECT 1 FROM MONTHLY_SUMMARY LAST_MONTH
    WHERE THIS_MONTH.USERID = LAST_MONTH.USERID
    AND ADD_MONTHS(THIS_MONTH.INVOICE_MONTH,-1) = LAST_MONTH.INVOICE_MONTH
)
AND EXISTS ( -- include records where there is an invoice amount for the same user in month 2,or more,priior to this month
    SELECT 1 FROM MONTHLY_SUMMARY LAST_MONTH
    WHERE THIS_MONTH.USERID = LAST_MONTH.USERID
    AND LAST_MONTH.INVOICE_MONTH <= ADD_MONTHS(THIS_MONTH.INVOICE_MONTH,-2) 
)
AND LAST_DAY(CURRENT_DATE) > THIS_MONTH.INVOICE_MONTH -- EXCLUDE THE CURRENT MONTH
AND THIS_MONTH.INVOICE_MONTH <> (SELECT MIN(INVOICE_MONTH) FROM MONTHLY_SUMMARY) -- Exclude 1st month in dataset
ORDER BY THIS_MONTH.INVOICE_MONTH,THIS_MONTH.USERID
;