在Oracle数据库中，您可以使用以下方法删除重复数据：
DELETE FROM your_table
WHERE ROWID NOT IN
(SELECT MIN(ROWID)
FROM your_table
GROUP BY column1, column2, ...);
DELETE FROM your_table
WHERE ROWID IN
(SELECT ROWID
FROM
(SELECT ROWID, ROW_NUMBER() OVER (PARTITION BY column1, column2, ... ORDER BY ROWID) rn
FROM your_table)
WHERE rn > 1);
请注意，在执行删除操作之前，请务必备份数据以防意外发生。
