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The side below lists the certification titles like 
 
70-433: TS: Microsoft SQL Server 2008, Database Development 
 
which seems is already retired (July 2013 I read elsewhere). It seems if someone who already has this certification cab take: 
 
70-457: Transition Your MCTS on SQL Server 2008 to MCSA: SQL Server 2012, Part 1 
70-458: Transition Your MCTS on SQL Server 2008 to MCSA: SQL Server 2012, Part 2 
 
Question 1: Can one still take 70-433 and then attempt to take 70-457 and or 70-458? 
 
Question 2: Why there is no xx-xxx: TS: Microsoft SQL Server 2012, Database Development to take?
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The side below lists the certification titles like 

70-433: TS: Microsoft SQL Server 2008, Database Development

which seems is already retired (July 2013 I read elsewhere). It seems if someone who already has this certification cab take:

70-457: Transition Your MCTS on SQL Server 2008 to MCSA: SQL Server 2012, Part 1
70-458: Transition Your MCTS on SQL Server 2008 to MCSA: SQL Server 2012, Part 2

Question 1: Can one still take 70-433 and then attempt to take 70-457 and or 70-458?

Question 2: Why there is no xx-xxx: TS: Microsoft SQL Server 2012, Database Development to take?

MCTS Exam 70-433 is retired...

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.

Microsoft SQL Server

Microsoft SQL Server 2008 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. Major improvements include the  Always On technologies and support for unstructured data types.

Microsoft SQL Server 2008

Microsoft SQL Server 2005 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. It includes support for managing XML data and allows a database server to be exposed over web services using Tabular Data Stream (TDS) packets encapsulated within SOAP (protocol) requests.