declare @day date
set @day='2012/12/31'
select DATEPART(DAYOFYEAR,@day)
結果爲:366
declare @day date
set @day='2012/12/31'
select DATEPART(DAYOFYEAR,@day)
結果爲:366
https://www.bilibili.com/video/BV1k8411575T/?vd_source=d68ed178f151e80fea1e02efd205802c