[英]Teradata Get MTD Unique Users for each day (ex. on 12th Mar I need to have 1st to 12th unique users. similarly for each date for last one year
我需要讓 MTD 唯一用戶數在過去 1 年內每天計數。 前任。 如果我的數據就像
dt customername
1 a
1 b
2 a
2 c
3 b
3 a
4 c
4 d
4 e
預期輸出 - 第一個只有 2 個唯一用戶。 在第 2 個(第 1 個和第 2 個)3 個用戶上。 第 3 位(第 1 至第 3 位)3 個用戶。 4 日(第 1 至 4 日)5 個用戶。 我在過去 1 年的每個日期的每個月都需要這個
dt uniquecustcount
1 2
2 3
3 3
4 5
我的數據采用以下格式,但 MTD 的核心邏輯高於 1。 請感謝任何幫助
CREATE MULTISET TABLE GK_DAILY_USERS ,NO FALLBACK ,
NO BEFORE JOURNAL,
NO AFTER JOURNAL,
CHECKSUM = DEFAULT,
DEFAULT MERGEBLOCKRATIO
(
EVENT_DATE DATE FORMAT 'yyyy-mm-dd',
Subs_Id INTEGER,
PAYMENT_METHOD_CD VARCHAR(8) CHARACTER SET UNICODE NOT CASESPECIFIC,
Data_User_Flag VARCHAR(1) CHARACTER SET UNICODE NOT CASESPECIFIC,
BUS_UNIT VARCHAR(20) CHARACTER SET LATIN NOT CASESPECIFIC,
Event_Count INTEGER)
PRIMARY INDEX ( EVENT_DATE ,Subs_Id );
Insert into GK_DAILY_USERS values (?,?,?,?,?,?);
我正在嘗試下面的sql。 我知道這個 sql 沒有意義,因此正在尋找解決方案。
SELECT EVENT_DATE, MAX(R2) FROM (
SELECT EVENT_DATE
,COUNT(A.SUBS_ID)OVER(ORDER BY ROWNUM,A.SUBS_ID) AS R2
FROM (
SELECT A.EVENT_DATE,A.SUBS_ID
,Row_Number() Over (Order by EVENT_DATE, SUBS_ID) rownum
,COUNT(A.SUBS_ID)OVER(PARTITION BY A.SUBS_ID ORDER BY A.EVENT_DATE) AS RUN_TOTAL3
FROM GK_DAILY_USERS A
WHERE Data_User_Flag='Y'
AND subs_id in (566875703,289813839, 151153086,279262050,18378517)
ORDER BY EVENT_DATE, SUBS_ID
) A
WHERE RUN_TOTAL3 = 1
) A GROUP BY EVENT_DATE ORDER BY 1
;
SELECT EVENT_DATE
-- new customers per date
,Sum(SUBS_ID) AS daily_new_cust
-- running total of new customers per date
,Sum(Sum(SUBS_ID))
Over(ORDER BY EVENT_DATE
ROWS Unbounded Preceding) AS unique_cust
FROM
(
SELECT *
FROM GK_DAILY_USERS
WHERE Data_User_Flag='Y'
AND subs_id IN (566875703,289813839, 151153086,279262050,18378517)
QUALIFY
-- return a single row with the earliest date for each subs_id
Row_Number()
Over (PARTITION BY A.SUBS_ID
ORDER BY EVENT_DATE) = 1
) AS dt
GROUP BY EVENT_DATE
ORDER BY 1
;
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