With the Release of SCCM Configmgr 2012 SP1 RTM,When you deploy Secondary Site from its Parent site ,it will install SQL Server Express 2008 R2 Service Pack 1 (SP1) but as you can see from below snap (SQL server Requirements),the minimum required cumulative update is CU6 which you will have to install it manually.
SCCM Configmgr Technical Preview update 1704 available
SCCM Current Branch Remote Console connectivity issues Insufficient privilege to connect, error Access is denied
SCCM Configmgr CI to check server role or feature installed
SCCM Configmgr SQL WQL query compare 2 or more collections to get the difference