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计算给定日期所在月的上月第一天sql语句

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Release: 2016-06-07 17:47:21
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计算给定日期所在月的上月第一天和最后一天 sql语句

计算给定日期所在月的上月第一天和最后一天 sql语句

declare @date  datetime
set @date=getdate()
--当前月第一天减去一个月
select dateadd(month,-1,dateadd(month,datediff(month,0,@date),0)) as '上月第一天'
--简化
select dateadd(month,datediff(month,0,@date)-1,0) as '上月第一天'
--另一种当前月第一天算法
select dateadd(month,-1,dateadd(day,1-datepart(day,@date),@date)) '上月第一天'
go
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