在Oracle數據庫中，要刪除重復的數據，可以使用以下方法：
DELETE FROM table_name
WHERE ROWID NOT IN
(SELECT MAX(ROWID)
FROM table_name
GROUP BY column1, column2, column3);
DELETE FROM
(SELECT column1, column2,
ROW_NUMBER() OVER (PARTITION BY column1, column2 ORDER BY column1) rn
FROM table_name)
WHERE rn > 1;
CREATE TABLE temp_table AS
SELECT DISTINCT * FROM table_name;
TRUNCATE TABLE table_name;
INSERT INTO table_name
SELECT * FROM temp_table;
DROP TABLE temp_table;
以上是幾種常用的方法刪除Oracle數據庫中重復的數據，根據具體情況選擇合適的方法。
