sql procedure 循环修改字段值?

Question

create procedure proc_dept
as
declare @cursor cursor,
@id varchar(50),
@pid varchar(100),
@name varchar(100)
begin
	set @cursor = cursor
	for
	select deparet_id, parent_deparet_id, deparet_name from dbo.tb_department_tree;
	open @cursor
	fetch next from @cursor into @id, @pid, @name;
	while(@@FETCH_STATUS = 0)
	begin
		if(@pid = null) 
		begin
			update tb_department_tree set scope = @name, tlevel = 1, tpath = @id where parent_deparet_id is null;
		end
		else
		begin 
			update tb_department_tree set scope = @name, tlevel = (select tlevel from tb_department_tree where deparet_id = @pid)+1, tpath = (select tpath from tb_department_tree where deparet_id = @pid)+'-'+@id where parent_deparet_id is not null;
		end;
		fetch next from @cursor into @id, @pid, @name;
	end;
end;

Answer 1

where条件弄错了