Tabla M-M de relaciones de consulta Mysql

Si conoce la identificación del grupo

select member.* from member m
  inner join member_has_group mg on m.id = mg.id_member
where mg.id_group = [x]

Si solo conoce el nombre del grupo

select member.* from member m
  inner join member_has_group mg on m.id = mg.id_member
  inner join group g on g.id = mg.id_group
where g.name = 'group name'