使用SQL的队列表

我有一篇文章解释了使用SQL进行客户保留分析的指南 我已经应用了解释过的SQL代码，但我总是会出错

下面的代码应该指出分析客户保留率的队列表是通过使用队列，并通过每个用户的第一次访问来定义他们，然后查看他们随时间的推移如何返回的：第一个月，新用户，保留月，保留，保留百分比

WITH first_visit AS
    (SELECT SUBS_ID,
           min(date_trunc('month',  (CUST_LOCAL_START_DATE::DATE))) AS first_month
    FROM ANALYTICS.tmp.Rate_Plan_Hierarchy
    GROUP BY 1
),
New_users AS
    (SELECT first_month,
           count(DISTINCT SUBS_ID) AS new_users
    FROM first_visit
    GROUP BY 1)             
SELECT first_month,
       new_users,
       retention_month,
       retained,
       retention_percent
FROM   (SELECT first_month,
               new_users,
              ( visit_tracker.visit_month - visit_log.visit_month ) AS
              retention_month,
              Count(DISTINCT visit_tracker.SUBS_ID) 
AS            
              retained,
              Count(DISTINCT visit_tracker.SUBS_ID)/new_users 
AS 
              retention_percent
        FROM ANALYTICS.tmp.Rate_Plan_Hierarchy visit_log
     LEFT JOIN ANALYTICS.tmp.Rate_Plan_Hierarchy  AS visit_tracker
            ON visit_log.SUBS_ID = visit_tracker.SUBS_ID
             AND date_trunc('month', CAST (visit_log.CUST_LOCAL_START_DATE AS DATE)) < date_trunc('month', CAST (visit_tracker.CUST_LOCAL_START_DATE AS DATE))
              LEFT JOIN new_users
                 ON new_users.first_month = first_visit.first_month
GROUP BY 1,
         2)t

我猜错误就在这个区域，我无法从子句中捕捉到tbale应该在哪个位置，以及左Join应该在哪个位置

     LEFT JOIN ANALYTICS.tmp.Rate_Plan_Hierarchy  AS visit_tracker
            ON visit_log.SUBS_ID = visit_tracker.SUBS_ID
             AND date_trunc('month', CAST (visit_log.CUST_LOCAL_START_DATE AS DATE)) < date_trunc('month', CAST (visit_tracker.CUST_LOCAL_START_DATE AS DATE))
              LEFT JOIN new_users
                 ON new_users.first_month = first_visit.first_month

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您是否检查过缺少/多余的逗号或不平衡的括号？准确的错误代码是什么？