小编Pav*_*eva的帖子

当我尝试减去时间戳并执行窗口函数（lead、lag和partition by）时，出现此错误：

函数“-”的参数类型无效：(TIMESTAMP_NTZ(9)、TIMESTAMP_NTZ(9))

尝试过date_diff，但这不能与窗口函数一起使用

SELECT 
   user_id,
   event,
   received_at,
   received_at - LAG( received_at,1) OVER (PARTITION BY user_id ORDER BY received_at) AS last_event
FROM 
   segment_javascript.help_center_opened