在Oracle中刪除重復數據，可以使用以下幾種方法：
DELETE FROM table_name
WHERE ROWID NOT IN (SELECT MAX(ROWID) FROM table_name GROUP BY column1, column2, ...);
DELETE FROM (
SELECT column1, column2, ..., ROW_NUMBER() OVER (PARTITION BY column1, column2, ... ORDER BY column1) AS rn
FROM table_name
)
WHERE rn > 1;
CREATE TABLE temp_table AS SELECT DISTINCT * FROM table_name;
DELETE FROM table_name;
INSERT INTO table_name SELECT * FROM temp_table;
DROP TABLE temp_table;
以上是一些常見的在Oracle中刪除重復數據的方法，具體選擇哪種方法取決于具體的情況和需求。
