MySQL使用某一条件查询出的数据和另以表中数据进行left jion连接

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SELECT
user_id,
user_name
 FROM
tik_groups_user as a
 LEFT JOIN tik_user as b ON a.user_id = b.id
 WHERE
   a.user_id IN(
     SELECT
    user_id
     FROM
    tik_groups_user
     WHERE
    groups_id = #{groupsId}
)
 ORDER BY a.groups_id