oracle数据去重多条件
程序员文章站
2024-03-19 16:51:10
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案例去重要求如下:
delete from excel
where rowid in (select aa.rid
from (select rowid as rid,
row_number() over(partition by 多层网标示 order by 不均衡类型 nulls last) as nu
from excel) aa
where nu > 1)