查詢 分組重複數據，保留最新的數據

--刪除重複的數據 保留最新的數據
with t as (
select * ,ROW_NUMBER()  over( PARTITION by a.DeviceId,a.PhoneNumber order by id desc  ) as od
from [dbo].[DeviceContact] a
)
delete from t
where od!= 1