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sum(amount) over(partition by customer_id order by visited_on desc range between current row and interval 6 day following) as cum_sum and later on average wil also work fine I guess. just an alternative solution
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sum(amount) over(partition by customer_id order by visited_on desc range between current row and interval 6 day following) as cum_sum and later on average wil also work fine I guess. just an alternative solution