根据时间把数据拼接分配成一条

select
DISTINCT(DATE_FORMAT(u_dynamic_time,'%Y年%m月')) as
photo_time,group_concat(u_dynamic_picture) as photo_des from
b_user_dynamic
where user_id =2
GROUP BY
DATE_FORMAT(u_dynamic_time,'%Y年%m月')
ORDER BY
DATE_FORMAT(u_dynamic_time,'%Y%m') DESC