Where is my content type used

If you have worked extensively with MOSS content types you have been in situations where you couldn't locate where the content type was used. Thanks for this blog you can now use the SQL below to retrieve that information.

DECLARE @ContentTypeName nvarchar(128)
SET @ContentTypeName='Document'
SELECT w.Title AS [Web Site], w.FullUrl AS [Web Url], al.tp_Title AS [List Title], ct2.* FROM ContentTypes ct1 JOIN ContentTypes ct2 ON LEFT(ct2.ContentTypeId, Len(ct1.ContentTypeId))=ct1.ContentTypeId LEFT OUTER JOIN dbo.ContentTypeUsage ctu ON LEFT(ctu.ContentTypeId, Len(ct2.ContentTypeId)) = ct2.ContentTypeId LEFT OUTER JOIN dbo.AllLists al ON ctu.ListId = al.tp_Id AND ctu.WebId=al.tp_WebId LEFT OUTER JOIN dbo.Webs w ON al.tp_WebId = w.Id WHERE ct1.ResourceDir=@ContentTypeName