Removing duplicate rows from table in Oracle

Question

I\'m testing something in Oracle and populated a table with some sample data, but in the process I accidentally loaded duplicate records, so now I can\'t create a primary ke

Answer 1

solution :

delete from emp where rowid in
(
    select rid from
    (
        select rowid rid,
        row_number() over(partition by empno order by empno) rn
        from emp
    )
    where rn > 1
);