id, discuss_id, comment, is_topping, create_at, is_author, parent_id, user_id, reply_num SELECT cadc.id, cadc.`comment`, cadc.`is_author`, su.`image_url`, IFNULL( su.`name`, su.nick_name ) AS userName, cadc.create_at FROM com_act_discuss_comment AS cadc LEFT JOIN sys_user AS su ON su.user_id = cadc.user_id where cadc.parent_id = #{id} and cadc.is_del = 2 order by cadc.create_at desc SELECT u.`name` userName, IFNULL(u.`nick_name`,'社区管理员') AS userNickName, u.`image_url`, u.phone, c.`comment`, c.`parent_id`, c.`is_author`, c.`is_topping`, COUNT( cu.id ) num, c.create_at, c.id FROM com_act_discuss_comment c JOIN sys_user u ON c.user_id = u.user_id LEFT JOIN com_act_discuss_comment_user cu ON c.id=cu.disscuss_comment_id WHERE c.parent_id = #{parentId} AND c.is_del = 2 GROUP BY c.id ORDER BY create_at desc