mysql數據庫遷移到oracle數據庫後 如何刪除相同的數據

mysql數據庫遷移到oracle數據庫後 如何刪除相同的數據

首先搞清楚有多少數據是重複的

select pid from product group by pid having count(pid) > 1

刪除重複記錄（id都是重複的）

delete from product
where
pid not in (select min(pid) from product group by pid having count(pid)>1)