目录

0 问题描述

1 数据准备

2 问题分析

3 小结 

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0 问题描述

有如下数据：反应了每月的页面浏览量

现需要按照如下规则计算每月的累计阅读量，具体计算规则如下：

最终结果如下：

1 数据准备

with data as(
select '2024-01' as month ,2  as pv union all
select '2024-02' as month ,5  as pv  union all
select '2024-03' as month ,6  as pv  union all
select '2024-04' as month ,9  as pv  union all
select '2024-05' as month ,60  as pv  union all
select '2024-06' as month