自己写了一个:
select `t`.`tid` AS `tid`,`t`.`mnumber` AS `mnumber`,`t`.`snumber` AS `snumber`,`t`.`tleader` AS `tleader`,`t`.`tname` AS `tname`,`t`.`title` AS `title`,group_concat(concat(concat(`s`.`name`,' ')) separator ', ') AS `members`,`t`.`torder` AS `torder` from (`team` `t` left join `students` `s` on((`t`.`tid` = `s`.`tid`))) group by `t`.`tid`