oracle--合并行数据

select  to_char(wmsys.wm_concat(patname)) as WaitPatientName from
    (SELECT *
   FROM (SELECT ROW_NUMBER() OVER(PARTITION BY cc.queuename ORDER BY cc.enroldate) rn,
         cc.*
         FROM
         (select * from
(select a.patname,a.queuesign,a.queuename,a.enroldate,a.status
from qs_register a where a.status='已登记'
group by a.patname,a.queuesign,a.queuename,a.enroldate,a.status
order by a.queuename,a.enroldate,a.status) bb)cc
         )
  WHERE rn in(1,2,3)
  ) temp
  group by queuename

合并前效果：

合并后效果：