TOP #2

Refactoring Databases: Evolutionary Database Design

Scott W. Ambler, Pramodkumar J. Sadalage
TOP #3

High Performance MySQL: Optimization, Backups, Replication, and More

Baron Schwartz, Peter Zaitsev, Vadim Tkachenko, Jeremy D. Zawodny, Arjen Lentz, Derek J. Balling
TOP #13

Microsoft® SQL Server® 2008 Internals (Developer Reference)

Kalen Delaney, Paul S. Randal, Kimberly L. Tripp, Conor Cunningham, Adam Machanic, Benjamin Nevarez
TOP #20