Sqlserver删除重复记录，保留最新(ID最大)的一条

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Delete A from GIS_Mall_Info A 
inner join ( select MAX(id) as ID,Ref_ID from GIS_Mall_Info group by Ref_ID having count(1)>1 ) 
B on B.Ref_ID=A.Ref_ID and B.ID<>A.ID