DataSource Controls :: Use SQL GROUP BY Statement To Create Menu?

I'm trying to create a menu structure, subpages within pages, for use with my cms. I have 3 tables in sql server, I would like to query all three tables and list those pages with a certain siteid, and subpages where the subid is the pageid. how to use the GROUP BY Statement to create the menu below? Or could I use vb.net to display it for me? Something like this:

sitename
page
page
page
page
subpage
subpage
subpage
page
page

Here is my query so far:

SELECT * FROM sites
LEFT JOIN pages ON sites.siteid=pages.siteid
LEFT JOIN subpages ON pages.pageid=subpages.pageid
WHERE sites.siteID = 1ORDER BY sites.siteid, pages.pagesub ASC

These are my tables:

sites
siteID int Unchecked PK
siteName nvarchar(MAX) Checked
siteAdmin nvarchar(MAX) Checked
siteLive bit Checked
Pages

pageID int Unchecked PK
siteID int Checked FK linked to siteid in sites table
pageLink nvarchar(MAX) Checked
pageBody ntext Checked
pageSummary ntext Checked
pageTitle ntext Checked
pageOrder int Checked
pageHome bit Checked

subpages

subID int Unchecked PK
PageID int Checked FK linked to pageid in pages table
subBody ntext Checked
subSummary ntext Checked
subTitle nvarchar(MAX) Checked
subOrder nvarchar(MAX) Checked