http://blogs.msdn.com/b/mikewat/archive/2008/08/11/upgrading-sharepoint-sql-servers-to-sql-server-2008.aspx

 

http://technet.microsoft.com/en-us/library/cc263447(office.14).aspx

 

http://www.tek-tips.com/viewthread.cfm?qid=1650384

 

http://en.share-gate.com/

 

http://blogs.technet.com/b/sbs/archive/2011/03/07/how-to-migrate-companyweb-to-a-sql-2008-r2-standard-instance-on-sbs-2011-part-3-migrating-the-content-database.aspx