Microsoft Certified IT Professional: Database Developer (MCITP: Database Developer) is the premier certification for database designers and developers. This credential demonstrates that you can design a secure, stable, enterprise database solution using Microsoft SQL Server 2005.
Database developers design and implement relational database models (logical and physical) and database storage objects. They also program servers using user defined functions, triggers, stored procedures, Transact-SQL, or the CLR. They retrieve or modify data using SQL queries or tune and optimize queries. Database developers are typically employed by midsize to large organizations.
MCITP candidates must first complete the requirements for the MCTS: SQL Server 2005 credential (one exam). After earning this credential, candidates earn their MCITP: Database Developer by passing two required exams.
For more information:
http://www.microsoft.com/learning/mcp/mcitp/dbdev/
CORE EXAMS
(70-431) SQL Server 2005 
(70-441) Designing Database Solutions
(70-442) Designing and Optimizing Data Access