在Oracle中，可以使用以下方法根據一個字段去重：
SELECT DISTINCT column_name FROM table_name;
SELECT * FROM (
SELECT column_name, ROW_NUMBER() OVER (PARTITION BY column_name ORDER BY column_name) AS rn
FROM table_name
) WHERE rn = 1;
SELECT column_name
FROM table_name
GROUP BY column_name;
這些方法可以幫助您根據一個字段在Oracle中進行數據去重操作。
