Oracle過濾重復數據的方法有以下幾種：
SELECT DISTINCT column1, column2, ...
FROM table_name;
SELECT column1, column2, ...
FROM table_name
GROUP BY column1, column2, ...;
SELECT column1, column2, ...
FROM table_name
WHERE rowid in (
SELECT min(rowid)
FROM table_name
GROUP BY column1, column2, ...
);
SELECT column1, column2, ...
FROM table_name
WHERE (column1, column2, ...) IN (
SELECT column1, column2, ...
FROM table_name
GROUP BY column1, column2, ...
);
以上是幾種常見的Oracle過濾重復數據的方法，可以根據具體情況選擇適合的方法。
