ESX Server 3 Installation Guide : Installing VMware Infrastructure Management : Preparing the VirtualCenter Server Database

Preparing the VirtualCenter Server Database
The VMware VirtualCenter Server requires a database to store and organize server data. VirtualCenter version 2 server supports Oracle, SQL Server, and Microsoft SQL Server 2005 Express.
VirtualCenter requires administration credentials (ID and password) to log in to an Oracle or SQL database. Contact your DBA for these credentials, or install the bundled Microsoft SQL Server 2005 Express database.
 
The database topics are covered in the following sections: