Sql 如何在每天添加的新用户旁边添加运行的用户总数？

我试图展示今天新增的用户，以及总数

这个

输出此

Date.         New  Total
"2020-04-21"    50  50
"2020-04-20"    40  40
"2020-04-19"    30  30
"2020-04-18"    20  20
"2020-04-17"    10  10

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如何在“总计”列中显示用户总数（到目前为止）？第21行应该是150行。

您可以使用窗口函数来实现这一点：基本上，您需要每组行数的窗口总和，如：

select
    date("CreatedAt") created_day,
    count(*) "New",
    sum(count(*)) over(order by date("CreatedAt")) "Total"
from "User"
group by date("CreatedAt")
order by created_day desc

select
    date("CreatedAt") created_day,
    count(*) "New",
    sum(count(*)) over(order by date("CreatedAt")) "Total"
from "User"
group by date("CreatedAt")
order by created_day desc