select stuff( ( select ','+odr.ccontact from t_order odr join t_order_tour tot on tot.uteamid='A52D1FB4-64B2-4C04-AD6B-05BC4959BD21' and odr.uid=tot.uorderid for xml path('') ) ,1,1,'')
Oracle:
SYS_CONNECT_BY_PATH
START WITH pid IS NULL CONNECT BY NOCYCLE PRIOR NO = pid
MySQL:
group_concat
详细可参考 http://www.cnblogs.com/kiant71/archive/2010/04/09/1752006.html