借助用户定义函数:create function f_tree()
returns @t table(CATEGORY_ID        int identity(1,1),
                 PARENT_CATEGORY_ID int,
                 CATEGORY_NAME      varchar(20),
                 ACTIVE_STATUS      varchar(10))
as
begin
    insert into @t(PARENT_CATEGORY_ID,CATEGORY_NAME,ACTIVE_STATUS)
    select 
        PARENT_CATEGORY_ID,
        CATEGORY_NAME,
        ACTIVE_STATUS
    from 
        TreeView    return @t
end
go
select * from dbo.f_tree()
go