SQL Server Release History

SQL Server 2012
codename Denali

SQL Server 2008 R2
codename Kilimanjaro

SQL Server 2008
codename Katmai

SQL Server 2005
codename Yukon

SQL Server 2000
codename Shiloh

SQL Server 7.0 OLAP
codename Plato

SQL Server 7.0
codename Sphinx

SQL Server 6.5
codename Hydra

SQL Server 6.0
codename SQL95

SQL Server 4.2.1
codename SQLNT

SQL Server 1.0, 1.1