SqlServer 表数据统计，相同属性的汇总到一列，并用逗号隔开

select DISTINCT b.DynamicID,STUFF((//stuff是截取第一个逗号
select ','+ a.RealName  from
(
select z.DynamicID,u.RealName from t_Dynamic_Zambia z
left join t_sys_User u on z.UserID=u.ID
)a where a.DynamicID=b.DynamicID
for xml path('')//关键语句，以xml的格式输出
),1,1,'') as namelist
from
(
select z.DynamicID,u.RealName from t_Dynamic_Zambia z
left join t_sys_User u on z.UserID=u.ID
)b