最近七天日期(星期几)
select datename(weekday,getdate()-6) as a,
datename(weekday,getdate()-5) as b,
datename(weekday,getdate()-4) as c,
datename(weekday,getdate()-3) as d,
datename(weekday,getdate()-2) as e,
datename(weekday,getdate()-1) as f,
datename(weekday,getdate()-0) as g