mysql实现多行查询结果合并成一行

原表中数据格式：

select round_nums, GROUP_CONCAT(cf) as cfs from pps_ads_arrange_info_cf where game_id = 3262 and channel_id = 42 and addtime >= '2015-08-22' and addtime < '2015-08-25' GROUP BY round_nums

处理完之后如下图：