摘要：
create function f_pid(@id varchar(3)) returns @t_level table(id varchar(3)) as begin insert into @t_level select @id select @id = IDParent from NodeNet where IDChild = @id and IDParent is not null while @@ROWCOUNT > 0 begin insert into @t_level select @id select @id = IDParent from NodeNet where 阅读全文
