sql-server - 如何在 T-SQL 中计算移动/滚动平均值

Question

我的 SQL 表中有年度数据（按天计算）。我想计算 3 个月的滚动/移动平均值。如何做到这一点？

Answer 1

也许这会给你一个建议。

drop table #temp

;with cte as
(
    select 1 as id
    union all
    select id + 1 from cte
    where id < 100
)
select 
    *, id / 10 as "year", null as "rolSum"
into #temp
from 
    cte 
where 
    id < 100

select "year", id from #temp order by "year"


declare @rolSum int = 0
update #temp set @rolSum = "rolSum" = @rolSum + id from #temp

select year, id, rolSum, avg( id * 1.0 ) over ( partition by "year" order by id ) from #temp

rolSumavg(...)如果不满足您的需求，则仅包含在内以进行进一步处理。