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分享select * from tb where dateadd(mm,3,addtime)>=getdate() ---3个月内
select * from tb where dateadd(mm,3,addtime)<getdate() --3个月外
select * from tb where datediff(mm,addtime,getdate())<=3 ---3个月内
or
select * from tb where datediff(mm,addtime,getdate())>3 --3个月外
select * from tb where datediff(mm,addtime,getdate())<=3 ---3个月内
select * from tb where datediff(mm,addtime,getdate())>3 --3个月外