The overview of MCSE (Microsoft Certified Solution Expert) Data Platform on SQL 2012 is here http://www.microsoft.com/learning/en/us/mcse-sql-data-platform.aspx
It consists of a MCSA (Microsoft Certified Solution Associate) on SQL 2012. You need to pass Exam 70-461, 70-462 and 70-463 stated in here http://www.microsoft.com/learning/en/us/mcsa-sql-certification.aspx.
After that, you need to complete 2 elective exams to earn your MCSE Data Platform on SQL 2012 - Exam 70-464 http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-464 and 70-465 http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-465.
If you deal with SQL 2008 and it is likely that you are going to upgrade to SQL 2012 in your environment/platform, you may consider getting certified on SQL 2008 and subsequently on SQL 2012. In this context, all Microsoft SQL server certification overviewsfor both SQL 2008 and SQL 2012 are here http://www.microsoft.com/learning/en/us/sql-certification.aspx covering the MCTS (Microsoft Certified Technology Specialist) on SQL 2008, MCITP (Microsoft Certified IT Professional) on SQL 2008, MCSA (Microsoft Certified Solution Associate) spanning 2 platform versions - SQL 2008 and SQL 2012, and the MCSE (Microsoft Certified Solution Expert) which covers 2 expertises of Data Platform and BI (Busines Intelligence) using Microsoft SQL 2012 technology.
For exsiting MCITP holders on SQL 2008, there is an upgrade path to earn your MCSE Data Platform, namely Exam 70-457, 70-458 and 70-459 towards SQL 2012. For MCSE Business Intelligence upgrade exams, they are Exam 70-457, 70-458 and 70-460. The details of these upgrade exams are here http://www.microsoft.com/learning/en/us/sql-certification.aspx.
More self-guided learning can be found here http://www.microsoftvirtualacademy.com.