MySQL 多字段聯合去重刪除重復數據保留id最小的一條

DELETE FROM 表名 WHERE (字段1,字段2,字段3)
IN 
(SELECT 字段1,字段2,字段3 FROM (SELECT 字段1,字段2,字段3 FROM 表名 GROUP BY 字段1,字段2,字段3 HAVING COUNT(*)>1) s1) 
AND
id NOT IN (SELECT id FROM (SELECT min(id) as id FROM 表名 GROUP BY 字段1,字段2,字段3 HAVING COUNT(*)>1) s2);

 

參考 https://www.cnblogs.com/XiaoMingBlingBling/p/11146375.html 修改最后一個子查詢中的 id 為 min(id) as id