I thought there was an option added in this version to allow this but I do not see it. If you want to install a database you can run the following script
C:\Program Files (x86)\EPiServer\CMS\7.5.394.2\Install\Modules\EPiServer Commerce 7.5.394.2\ECF\Data\SqlScripts\Helpers\Setup.bat with the following parameters from the bat file
The script will create the database and the set the specified dbuser and dbpass as the dbo of the newly created database.
Is there out of the box way to install Commece database schema without installing Commerce site?
I know that that is easy for Cms schema. There is corresponding action in Deployment Center for CMS, but there is nothing similar for Commerce.