As this post is being written, the official MS procedure to migrate a SCOM 2012 operational Database is incomplete. See the official procedure here: http://technet.microsoft.com/en-us/library/hh278848.aspx
There are two extra steps that you have to do. One I’ve documented in a previous post:
You need to change the values in the key below. Otherwise, you’ll have issues and trying to apply SP1, for example. It tries to talk to you old server and can’t figure out the upgrade scenario.
Update: there is actually another step you should do avoid the funky (useless)SQL messages you see when something SQL related happens. Please see the article below from Marnix Wolf:
Hope this helps!