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Special window function rank, deny_ rank, row_ number

2022-04-23 13:41:00 【Wangcai 2】

select *,
   rank() over (order by  achievement  desc) as ranking,
   dense_rank() over (order by  achievement  desc) as dese_rank,
   row_number() over (order by  achievement  desc) as row_num
from  Class table

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