Installing Service Packs and Cumulative Updates
If you are installing SQL Server 2008 instead of SQL Server 2008 R2, it is recommended that you install SQL Server 2008 Service Pack 1. SQL Server 2008 SP1 doesn’t provide any significant new features for SQL Server 2008 but does provide a number of fixes to the GA release version of SQL Server 2008 (Microsoft Knowledge Base article
968369 lists all the fixes).
Service Pack 1 does provide a few new features primarily to ease the deployment of service packs and cumulative updates. The first of these is Slipstream installations. Slipstreaming is an installation method that integrates the base installation files for SQL Server with its service packs and cumulative updates and enables you to install ...