Oracle 分组聚合二种写法，listagg和wmsys.wm_concat

with temp as(

select 'China' nation ,'Guangzhou' city from dual union all

select 'China' nation ,'Shanghai' city from dual union all

select 'China' nation ,'Beijing' city from dual union all

select 'USA' nation ,'New York' city from dual union all

select 'USA' nation ,'Bostom' city from dual union all

select 'Japan' nation ,'Tokyo' city from dual 

)

select nation,listagg(city,',') within GROUP (order by city)

from temp

group by nation

select goodsid,listagg(ss.StorageNo,',')  within group (order by ss.StorageNo) StorageNo

      from StorageGoods ssg

      left join storage ss on ssg.storageid=ss.guid

      group by goodsid

select goodsid,wmsys.wm_concat(ss.StorageNo) StorageNo

      from StorageGoods ssg

      left join storage ss on ssg.storageid=ss.guid

      --where ssg.goodsid=sd.goodsid

      group by goodsid

 另参考：http://dacoolbaby.iteye.com/blog/1698957