select c.pm_ci CI_ID, wm_concat(s.stu_name) STU_NAME
from pm_ci c , pm_stu s
where instr(c.stu_ids , s.stu_name) > 0
group by c.ci_id;
from pm_ci c , pm_stu s
where instr(c.stu_ids , s.stu_name) > 0
group by c.ci_id;