sqlserver with as 双向递归

递归上下级部门，获取相关的部门单位

1. 部门表：
2. sql语句：

   with Temp1 as
   (
   select GroupID,G_ParentID from sys_Group  where GroupID={当前部门GroupID}
   union all
   select sys_Group.GroupID,sys_Group.G_ParentID from Temp1  inner join sys_Group on Temp1.G_ParentID=sys_Group.GroupID
     ),
   Temp2 as
    (
   select GroupID,G_ParentID from sys_Group  where GroupID={当前部门GroupID}
   union all
   select sys_Group.GroupID,sys_Group.G_ParentID from Temp2  inner join sys_Group on Temp2.GroupID=sys_Group.G_ParentID
    )
   select GroupID from  Temp1 union  select GroupID from Temp2