如何在 Oracle 中每天计算列 MTD、QTD、YTD 的总和

Question

I have a table with data starting from Jan 1, 2021 to current date. I want to calculate the MTD, QTD, YTD values every day.

For example: Data table sample

Answer 1

It looks like you just want a simple analytic function

select sum( daily_count ) over (partition by month order by dt) mtd,
       sum( daily_count ) over (partition by quarter order by dt) qtd,
       sum( daily_count ) over (partition by year order by dt) ytd
  from your_table