Overview
SQL Server 2008 R2 Service Pack 1(SP1) Customer Technology Preview (CTP) is now available for download. SQL Server 2008 R2 service packs are cumulative updates and upgrade all service levels of SQL Server 2008 R2 to SP1 CTP. This service pack contains the cumulative updates up to SQL Server 2008 R2 SP1 cumulative update packages 6. You can use these packages to upgrade any of the following SQL Server 2008 R2 editions:
(1) SQL Server 2008 R2 Parallel Computing Edition
(2) SQL Server 2008 R2 Datacenter Edition
(3) SQL Server 2008 R2 Enterprise Edition and Developer Edition
(4) SQL Server 2008 R2 Standard Edition
(5) SQL Server 2008 R2 Web Edition
(6) SQL Server 2008 R2 Workgroup Edition
(7) SQL Server 2008 R2 Express Edition
Note : These packages are available for testing purposes only in a non-production environment. To upgrade SQL Server 2008 R2 Express Edition, obtain the SP1 version of Express Edition or Express Edition with Advanced Services.
Read more: MS Download