I stopped installing owncloud from debian ?backports, see end of site
Here are some short notes while installing owncloud in DebianWheezy with mysql. The package is in the Backports repository.
Different databases
DebianPk:owncloud needs a SQL database to work. One of sqlite , mysql or postgres is often used.
Instead of owncloud you can choose one of the package from owncloud-sqlite , owncloud-mysql or owncloud-postgres . They install the database as a dependency. As of writing there are two different versions of owncloud-"database-name" (5.x 7.x).
Initial configuring of owncloud
When my browser showed http://IP/owncloud I wanted to configure owncloud initially. Since owncloud suggests /usr/share/owncloud/data as a data directory (some hours later I got the hint, that /usr/share/owncloud/data is linked to /var/lib/owncloud/data, I didn't check this) , I asked in #debian-owncloud and #debian.de for opinions about using /usr. In #debian.de I got the hint to dismiss the debian backports package and to install owncloud from owncloud.org. In #debian-owncloud I got the answer, that the owncloud-$database package are long gone and the packages in backports are cruft.