小编sql*_*foo的帖子

我正在尝试RANGE在窗口函数中使用 postgres子句将窗口动态设置为过去 4 周，不包括当前日期。这是我的尝试：

SELECT date("aa0"."created_at") AS "Day of Created At",
       "aa0"."user_id" AS "User Id",
       count (*) activities_today,
       count(*) over (PARTITION BY "aa0"."user_id"
                      ORDER BY date("aa0"."created_at") ASC
                      RANGE BETWEEN date("aa0"."created_at" - interval '4 weeks')
                                    AND 
                                    date("aa0"."created_at" - interval '1 day')
                ) active_days_past_4_weeks
FROM "public"."activity_activity" AS "aa0"
GROUP BY date("aa0"."created_at"), "aa0"."user_id" 
ORDER BY "Day of Created At" ASC LIMIT 1000;

但是，我收到以下错误：

ERROR: syntax error at or near ")" Position: 459

如果我使用ROWS而不是RANGE它有效，但这不是正确的逻辑，因为不能保证每天都会有一行：

SELECT date("aa0"."created_at") AS "Day …