Is it supported to install an earlier version of SQL Server (2008 R2 in my case) after a newer version (2012) has already been installed?
The documentation says that you can install SQL Server on a server where an earlier version has already been installed:
"You can also upgrade earlier versions of SQL Server, or install SQL Server on a computer where earlier SQL Server versions are already installed."
- http://msdn.microsoft.com/en-us/library/ms143694%28v=sql.105%29.aspx
However, I want to do the opposite. Is this supported?