第一種前提是資料表設計id自增
select
*from t_user where id in
(select
max(id)
from t_user group
by user_id)
select
*from
(select
*from t_user order
by create_time desc
limit
10000
) a group
by user_id
select
*from
(select
*from t_user order
by create_time desc
) a group
by user_id
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