mySQL hierarchical grouping sort

Question

I have a schema that essentially looks like this:

CREATE TABLE `data` (
  `id` int(10) unsigned NOT NULL,
  `title` text,
  `type` tinyint(4),
  `parent` int         


        

Answer 1

Here's a solution tested to work on SQL Server. Should be essentially the same on MySQL

select Id, Title, [Type], Id as OrderId from Hier h1 where [Type] = 1
union
select Id, Title, [Type], Parent as OrderId from Hier h2 where [Type] = 2
order by OrderId, [Type]