Nice one,
why not put all related links
Features Supported by the Editions of SQL Server 2008
http://msdn.microsoft.com/en-us/library/cc645993(v=sql.100).aspx
Features Supported by the Editions of SQL Server 2008 R2
http://technet.microsoft.com/en-us/library/cc645993(v=sql.105).aspx
Features Supported by the Editions of SQL Server 2012
http://technet.microsoft.com/en-us/library/cc645993.aspx
-------------------------------------------------------------
"It takes 15 minutes to learn the game and a lifetime to master"
"Share your knowledge. It's a way to achieve immortality."