Database is in compatibility range and upgrade is recommended

Source: http://www.justanothertechnologyguy.com/2011/11/databases-require-upgrade-or-not.html

Upgrading Content databases using SharePoint 2010 Management Shell

• Start the “SharePoint 2010 Management Shell”
• In the Shell enter : Get-SPContentDatabase –site [url towards your site collection]
• Cut and paste the GUID to the following command:Upgrade-SPContentDatabase [guid]

It will take some time before the 100% appears.

Upgrading ‘all other’ type of databases using psconfig.exe

• Open a command box in ‘run as administrator’ mode.
• Navigate to the bin directory of the SharePoint root. C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\BIN
• Run the following command: PSConfig.exe -cmd upgrade -inplace b2b -force -cmd applicationcontent -install -cmd installfeatures

The PSConfig.exe tool will go though several steps to upgrade all the databases in the correct sequence.
Validate that all the databases where updated successfully.

• Open “Central Administration”.
• Click “Upgrade and Migration”
• Click “Review Database Status”

When the process is complete all of the databases should say ‘no action required’