Link

I was in a scenario where I was trying to delete SQL Express but failed.  Needed to patch the RTM version on the server to ultimately install SharePoint 2010 binaries.

This was very helpful when I needed to find out the number of patches released for SQL 2008.  RTM was so far down the list 😉

http://www.sqlsecurity.com/FAQs/SQLServerVersionDatabase/tabid/63/Default.aspx