select * from(
select t.*,row_number()over(partition by a,b order by case c when 1 then 1 else 2 end)rn
from 表 t)
where rn=1
select t.*,row_number()over(partition by a,b order by case c when 1 then 1 else 2 end)rn
from 表 t)
where rn=1
解决方案 »
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