6个月滚动平均值SQL

这是我的小提琴

以上只是样本，我有3年的数据，有些行也会有空值

我需要实现：

滚动6个月平均每周销售

滚动6个月平均日销售额

这就是我正在尝试的，但不知道这种方法是否正确

select 
    x.*,
    avg(avg_amount) over (partition by id order by id, trans_date 
                          rows between unbounded preceding and current row) as rolling_avg
from 
    (select 
         id,
         cast(right(trans_date, 2) as int) AS Week,
         cast(left(trans_date, 4) as int) as Year, 
         trans_date, 
         sum(amount) as avg_amount
     from 
         transactiondb
     group by 
         id, trans_date) x

---

请出示你想要的结果。我还不知道结果会是什么。我需要建立并展示给我的领导。然后我可能会有一些想法@DaleKThats一个解决问题的倒退方法。。。通常情况下，你需要手动计算出你期望的结果，这样你就知道什么时候你的查询是正确的。不清楚“滚动6个月”是什么意思，试着用你的样本数据解释一下，期望的输出也会有帮助。我想他们希望给定一组样本数据的期望输出，它不必是很多行或真实数据，只需演示您想要实现的逻辑即可

select 
    x.*,
    avg(avg_amount) over (partition by id order by id, trans_date 
                          rows between unbounded preceding and current row) as rolling_avg
from 
    (select 
         id,
         cast(right(trans_date, 2) as int) AS Week,
         cast(left(trans_date, 4) as int) as Year, 
         trans_date, 
         sum(amount) as avg_amount
     from 
         transactiondb
     group by 
         id, trans_date) x