oracle刪除重複記錄，只保留一條記錄

DELETE FROM hs a WHERE ROWID <> (SELECT MIN (ROWID) FROM hs b WHERE a.hsflid = b.hsflid AND a.flqw_id = b.flqw_id);  先找到記錄對應的ROWID的最小值，並跟據這個最小值來判斷是

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