sql server group by 拼接

select g.GameItem,g.UserId,b.vipLevel,

CAST((

    SELECT  a.orderId+',' FROM G_Game_Order a

    WHERE  g.userId=a.userId and  SettleTime>='2023-09-25 00:00:00' and SettleTime<='2023-09-25 23:59:59' and XmState=0 and status=1  

    FOR XML PATH('')) as varchar(max)) as maskdetail  

from G_Game_Order as g ,C_User_Register as b  

where g.UserId= b.UserId and  SettleTime>='2023-09-25 00:00:00' and SettleTime<='2023-09-25 23:59:59' and XmState=0 and status=1

group by g.GameItem,g.UserId,b.vipLevel