Sql 在bigquery上创建子查询时发生左外部联接错误
我正试图从我的bq上的事件表中评估MAL、WAL和DAU 我创建了一个查询找到DAU和他一起找到WAU和MAU, 但它不起作用,我收到了以下错误:Sql 在bigquery上创建子查询时发生左外部联接错误,sql,google-bigquery,subquery,left-join,Sql,Google Bigquery,Subquery,Left Join,我正试图从我的bq上的事件表中评估MAL、WAL和DAU 我创建了一个查询找到DAU和他一起找到WAU和MAU, 但它不起作用,我收到了以下错误: LEFT OUTER JOIN cannot be used without a condition that is an equality of fields from both sides of the join. 这是我的问题 WITH dau AS ( SELECT date, COUNT(DISTINCT(
LEFT OUTER JOIN cannot be used without a condition that is an equality of fields from both sides of the join.
这是我的问题
WITH dau AS (
SELECT
date,
COUNT(DISTINCT(events.device_id)) as DAU_explorer
FROM `workspace.event_table` as events
GROUP BY 1
)
SELECT
date,
dau,
(SELECT
COUNT(DISTINCT(device_id))
FROM `workspace.event_table` as events
WHERE events.date BETWEEN DATE_ADD(dau.date, INTERVAL -30 DAY) AND dau.date
) AS mau,
(SELECT
COUNT(DISTINCT(device_id)) as DAU_explorer
FROM `workspace.event_table` as events
WHERE events.date BETWEEN DATE_ADD(dau.date, INTERVAL -7 DAY) AND dau.date
) AS wau
FROM dau
我的错误在哪里?无法在bq上运行这样的子查询吗?请尝试以下操作:
WITH data AS (
SELECT DATE(creation_date) date, owner_user_id device_id
FROM `bigquery-public-data.stackoverflow.posts_questions`
WHERE EXTRACT(YEAR FROM creation_date)=2017
)
#standardSQL
SELECT DATE_SUB(date, INTERVAL i DAY) date_grp
, COUNT(DISTINCT IF(i<31,device_id,null)) unique_30_day_users
, COUNT(DISTINCT IF(i<8,device_id,null)) unique_7_day_users
FROM `data`, UNNEST(GENERATE_ARRAY(1, 30)) i
GROUP BY 1
ORDER BY date_grp
LIMIT 100
OFFSET 30
如果你想找一个。@jaimerq,他已经在顶部提供了错误。:S谢谢,我没有意识到……@GabrelVelhoGhellere。在BigQueryAlas中不可能编写这样的查询。而且,这个错误不容易解决。谢谢@GordonLinoff,你知道用sql评估这个kpi的另一种方法吗?比如python中的.rolling30.sum和rolling7.sum?@Gabrielvelhoghhelle。这些不是简单一点的滚动计算。这些是滚动的不同计数。谢谢,这是非常有趣的处理数组的方法,我将阅读更多。很好用,谢谢。