I was not able to check if there is some exam for SQL Server, but this can help someone anyway.
Quick recap of conditions:
- Offer good until December 31, 2014 for up to a total of 10,000 vouchers distributed worldwide.
- Eligible exams: A voucher may be redeemed to take one of the following MCP exams: 71-532 (beta), 70-533, 70-346 or 70-347. This offer does not include Microsoft Technology Associate exams.
- Offer ends on December 31, 2014 or while supplies last. Individuals must register for and take all exams prior to December 31, 2014.
Exam 71-532 Developing Microsoft Azure Solutions (beta) – This exam is currently in beta.
Exam 70-533 Implementing Microsoft Azure Infrastructure Solutions
Exam 70-346 Managing Office 365 Identities and Requirements
Exam 70-347 Enabling Office 365 Services