在網上查詢刪除重複資料保留id最小的資料，方法如下：

DELETE
FROM
  people
WHERE
  peopleName IN (
    SELECT
      peopleName
    FROM
      people
    GROUP BY
      peopleName
    HAVING
      count(peopleName) > 1
  )
AND peopleId NOT IN (
  SELECT
    min(peopleId)
  FROM
    people
  GROUP BY
    peopleName
  HAVING
    count(peopleName) > 1
)

自己使用的時候顯示報錯：

delete from tb where id in (SELECT max(id) from tb GROUP BY user HAVING count(user)>1)

[Err] 1093 - You can't specify target table ‘XXX' for update in FROM clause

暫時不知道是什麼原因導致的。

然後想辦法分佈操作，首先篩選出有重複user的資料，然後用max()選出其中較大的那一行：

SELECT max(id) from tb GROUP BY user HAVING count(user)>1

然後再根據得到的max(id)逐條刪除多餘的資料

delete from tb where id=xx

是個笨方法，暫時先解決問題吧。

總結

以上所述是小編給大家介紹的Mysql刪除重複資料保留最小的id 的解決方法，希望對大家有所幫助，如果大家有任何疑問歡迎給我留言，小編會及時回覆大家的！