SQL - 不等左连接 BigQuery

SQL - Unequal left join BigQuery

这里是新的。随着时间的推移,我正在尝试获取每日和每周的活跃用户。他们有 30 天的时间才会被视为不活跃。我的目标是创建可以按 user_id 拆分的图表,以显示同类群组、地区、类别等。

我已经创建了一个日期 table 来获取该时间段的每一天,并且我有简化的订单 table 以及我需要计算它的基本信息。

我正在尝试使用以下 SQL 查询执行 Left Join 以按日期获取状态:

WITH daily_use AS (
        SELECT
          __key__.id AS user_id
          , DATE_TRUNC(date(placeOrderDate), day) AS activity_date
        FROM `analysis.Order`
        where isBuyingGroupOrder = TRUE 
          AND testOrder = FALSE
        GROUP BY 1, 2
 ),
dates AS (
        SELECT DATE_ADD(DATE "2016-01-01", INTERVAL d.d DAY) AS date
        FROM
          (
           SELECT ROW_NUMBER() OVER(ORDER BY __key__.id) -1 AS d
           FROM `analysis.Order`
           ORDER BY __key__.id
           LIMIT 1096
          ) AS  d
        ORDER BY 1 DESC
      )

SELECT
      daily_use.user_id
    , wd.date AS date
    , MIN(DATE_DIFF(wd.date, daily_use.activity_date, DAY)) AS days_since_last_action
FROM dates AS wd

LEFT JOIN daily_use
    ON wd.date >= daily_use.activity_date
    AND wd.date < DATE_ADD(daily_use.activity_date, INTERVAL 30 DAY)

GROUP BY 1,2

我收到此错误:如果连接两侧的字段相等,则无法使用 LEFT OUTER JOIN。在 BigQuery 中,我想知道如何解决这个问题。我在 BigQuery 中使用标准 SQL。

谢谢

以下是针对 BigQuery Standard SQL 的,主要是在您的查询中重现逻辑,但不包括根本没有 activity 的日子

#standardSQL
SELECT
    daily_use.user_id
  , wd.date AS DATE
  , MIN(DATE_DIFF(wd.date, daily_use.activity_date, DAY)) AS days_since_last_action
FROM dates AS wd
CROSS JOIN daily_use
WHERE wd.date BETWEEN 
  daily_use.activity_date AND DATE_ADD(daily_use.activity_date, INTERVAL 30 DAY)
GROUP BY 1,2
-- ORDER BY 1,2

如果出于某种原因您仍然需要 exactly 重现您的逻辑 - 您可以在上面使用最终左连接,如下所示:

#standardSQL
SELECT *
FROM dates AS wd
LEFT JOIN (
  SELECT
    daily_use.user_id
    , wd.date AS date
    , MIN(DATE_DIFF(wd.date, daily_use.activity_date, DAY)) AS days_since_last_action
  FROM dates AS wd
  CROSS JOIN daily_use
  WHERE wd.date BETWEEN 
    daily_use.activity_date AND DATE_ADD(daily_use.activity_date, INTERVAL 30 DAY)
  GROUP BY 1,2
) AS daily_use
USING (date)
-- ORDER BY 1,2