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select *,ROW_NUMBER() over(partition by xuexiao,kelei order by zongfen) zongfen_rank
from phpmyadmin
UPDATE phpmyadmin
SET zhongfen_rank = t.zhongfen_rank
FROM phpmyadmin P
JOIN (
SELECT id,
RANK() OVER(PARTITION BY xuexiao,kelei
ORDER BY zhongfen DESC
) zhongfen_rank
FROM phpmyadmin
) t
ON phpmyadmin.id = t.id