select p.ci_id,max(stu_name) as STU_NAME
from (select c.ci_id,wm_concat(s.stu_name)
over(partition BY c.stu_ids order by s.stu_id) as stu_name
from pm_ci c,pm_stu s
where instr(c.stu_ids,s.stu_id) > 0) p
group by p.ci_id
拿走，不謝，已測試通過
select t3.ci_id as CI_ID,
wm_concat(t3.stu_name) as STU_NAME
from
(
select t1.ci_id,t2.stu_name
from pm_ci t1 cross join pm_stu t2
where instr(t1.stu_ids,t2.stu_id)>0
) t3
group by t3.ci_id;
SELECT CI_ID,WM_CONCAT(STU_NAME) STU_NAMES
FROM (SELECT CI_ID,STU_NAME FROM PM_CI,PM_STU
WHERE INSTR(STU_IDS,STU_ID)<>0) GROUP BY CI_ID,結果是正確的，可是出現了一個問題，STU_NAMES字段顯示(HUGECLOB)，只有點開后面的省略號才能看到字符串值，求解答
