DELETE zzz_statis_20190114_copy
FROM
zzz_statis_20190114_copy,
(
SELECT min(id) as id, openid
FROM
zzz_statis_20190114_copy
GROUP BY openid
) t2
where
zzz_statis_20190114_copy.openid = t2.openid
and zzz_statis_20190114_copy.id > t2.id
DELETE zzz_statis_20190114_copy
FROM
zzz_statis_20190114_copy,
(
SELECT min(id) as id, openid
FROM
zzz_statis_20190114_copy
GROUP BY openid
) t2
where
zzz_statis_20190114_copy.openid = t2.openid
and zzz_statis_20190114_copy.id > t2.id
https://www.bilibili.com/video/BV1k8411575T/?vd_source=d68ed178f151e80fea1e02efd205802c