我在 Verisk Touchstone 经营一个地点,想了解平均每 10 年发生多少次飓风事件(记录)。
我可以通过在输出中每 10 年运行以下脚本(见下文)来解决这个问题,但这需要很长时间。您知道是否有办法自动执行此操作/一次性执行所有操作吗?希望我说得有道理......
select *
from [dbo].[t1_HAZ_Intensity]
where YearID<=10
select *
from [dbo].[t1_HAZ_Intensity]
where YearID>=10 and YearID<=20
select *
from [dbo].[t1_HAZ_Intensity]
where YearID>=20 and YearID<=30
...等等
我尝试运行以下代码,但这需要很长时间,因为事件目录中有 2000 年
select *
from [dbo].[t1_HAZ_Intensity]
where YearID<=10
select *
from [dbo].[t1_HAZ_Intensity]
where YearID>=10 and YearID<=20
select *
from [dbo].[t1_HAZ_Intensity]
where YearID>=20 and YearID<=30
....
您可以计算几十年并用它们来
GROUP BY
select count(*) as count, concat(decade, '-', decade + 9) as year
from (select floor(YearID / 10) * 10 as decade
from [dbo].[t1_HAZ_Intensity]) t
group by decade