I feel like I should apologize for Alvin as his answer might seem rude. But he makes a very good point.
There's a lot of documentation on the changes from what version to another and have a title that will match a simple Google/Bing search.
What's New in SQL Server 2012
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2