Before you install VUM, you need to decide whether to use an existing or separate database server or use the installer-packaged SQL Express. The installer-packaged SQL Express is only recommended for nonproduction environments. Most environments will already have a DB server hosting other databases. You could either choose to host the VUM database on the existing DB server or install and configure a new DB server.
For a list of compatible databases with vSphere Update Manager, you can use the VMware Product Interoperability Matrixes.
For more details, visit http://www.vmware.com/resources/compatibility/sim/interop_matrix.php.
Select Solution/Database Interoperability. In step 1, select the product as