Oracle根据ROWID去重

例子：

DELETE FROM 表 A
 WHERE ROWID IN (SELECT ROWID_
                   FROM (SELECT 字段1,
                                字段2,
                                ROWID ROWID_,
                                ROW_NUMBER() OVER(PARTITION BY 字段1,字段2 ORDER BY 1) ROW_NUM
                           FROM 表 A)
                  WHERE ROW_NUM > 1);