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sql 计算给定日期所在年度的天数语句

Jun 07, 2016 pm 05:47 PM
sql date given calculate

sql 计算给定日期所在年度的天数语句

declare @date datetime;
set @date = getdate()
--本年度第一天与下年度第一天所差的天数
select datediff(day,dateadd(year,datediff(year,0,@date),0),dateadd(year,1+datediff(year,0,@date),0))
--借助变量简化
select @date = dateadd(year,datediff(year,0,@date),0) --本年度第一天
select datediff(day,@date,dateadd(year,1,@date))
go
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