Oracle删除重复的记录

select name from Person group by name having count(*)>=2;

select id from Person where name in (select name from Person group by name having count(*)>=2);

select min(id) from Person group by name having count(*) >= 2;
select min(id), name, count(*) from Person group by name having count(*) >= 2;

delete from Person where 
	-- 删除姓名相同数量>=2的数据
        id in (select id from Person where name in (
                select name from Person group by name having count(*) >= 2))
	-- 并且不是第一条
        and id not in (select min(id) from Person group by name having count(*) >= 2);