MYSQL_实用 SQL_删除重复数据

DELETE
FROM
    pub_goods
WHERE
    goodsno IN (
        SELECT
            *
        FROM
            (
                SELECT
                    goodsno
                FROM
                    pub_goods
                GROUP BY
                    goodsno
                HAVING
                    COUNT(goodsno) > 1
            ) t1
    )
AND mgoodsid NOT IN (
    SELECT
        *
    FROM
        (
            SELECT
                MIN(mgoodsid)
            FROM
                pub_goods
            GROUP BY
                goodsno
            HAVING
                COUNT(goodsno) > 1
        ) t2
)