sql日期查询

select getdate()  
select dateadd(year,-1,getdate())  
select datediff(day,getdate(),dateadd(day,2,getdate())  ) 
Select datepart(month, dateadd(month,1,getdate())) 
Select datepart(hour, dateadd(month,1,getdate()))   
Select datename(weekday, getdate())   
select 当前日期=convert(varchar(4),getdate(),20),当前时间=convert(varchar(8),getdate(),114)
select datename(hh,getdate())
select 本年第多少周=datename(week,getdate()),今天是周几=datename(weekday,getdate())
select*from AAE_GroupPlan

select datepart(year,getdate())+'0'