在Oracle中刪除完全重復的數據，可以通過以下步驟實現：
SELECT ROWID, ROWNUM
FROM (
SELECT ROWID, ROWNUM() OVER (PARTITION BY column1, column2, ... ORDER BY ROWID) AS r
FROM your_table
) t
WHERE r > 1;
DELETE FROM your_table
WHERE ROWID IN (
SELECT ROWID
FROM (
SELECT ROWID, ROWNUM() OVER (PARTITION BY column1, column2, ... ORDER BY ROWID) AS r
FROM your_table
) t
WHERE r > 1
);
通過以上步驟，可以找到并刪除表中的完全重復數據。在執行刪除操作之前，請務必備份數據以防數據丟失。
