在Oracle数据库中,您可以使用以下方法删除重复数据:
- 使用ROWID进行删除:
DELETE FROM your_table WHERE ROWID NOT IN (SELECT MIN(ROWID) FROM your_table GROUP BY column1, column2, ...);
- 使用ROW_NUMBER()函数进行删除:
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。