mysql

root@owncloud:~# apt-get install mysql-server*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'mysql-server-core-5.0' for regex 'mysql-server*'
Note, selecting 'mysql-server-core-5.1' for regex 'mysql-server*'
Note, selecting 'mysql-server-core-5.5' for regex 'mysql-server*'
Note, selecting 'mysql-server-core-5.6' for regex 'mysql-server*'
Note, selecting 'mysql-server-5.0' for regex 'mysql-server*'
Note, selecting 'mysql-server-5.1' for regex 'mysql-server*'
Note, selecting 'mysql-server-5.5' for regex 'mysql-server*'
Note, selecting 'mysql-server-5.6' for regex 'mysql-server*'
Note, selecting 'virtual-mysql-server-core' for regex 'mysql-server*'
Note, selecting 'mysql-server' for regex 'mysql-server*'
Note, selecting 'mysql-server-core' for regex 'mysql-server*'
Note, selecting 'virtual-mysql-server' for regex 'mysql-server*'
Note, selecting 'mysql-server-core-5.5' instead of 'mysql-server-core'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mysql-server-5.5 : Depends: mysql-client-5.5 (>= 5.5.49-0ubuntu0.14.04.1) but it is not going to be installed
                    PreDepends: mysql-common (>= 5.5.49-0ubuntu0.14.04.1) but it is not going to be installed
 mysql-server-5.6 : Depends: mysql-client-5.6 (>= 5.6.30-0ubuntu0.14.04.1) but it is not going to be installed
                    PreDepends: mysql-common (>= 5.5) but it is not going to be installed
                    Recommends: mysql-common-5.6
                    Breaks: mysql-server-5.5 but 5.5.49-0ubuntu0.14.04.1 is to be installed
                    Breaks: virtual-mysql-server
 mysql-server-core-5.6 : Breaks: mysql-server-core-5.5 but 5.5.49-0ubuntu0.14.04.1 is to be installed
E: Unable to correct problems, you have held broken packages.
root@owncloud:~# apt-get install mysql-server-5.5
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mysql-server-5.5 : Depends: mysql-client-5.5 (>= 5.5.49-0ubuntu0.14.04.1) but it is not going to be installed
                    PreDepends: mysql-common (>= 5.5.49-0ubuntu0.14.04.1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root@owncloud:~# apt-get purge mysql-server-5.5
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'mysql-server-5.5' is not installed, so not removed
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.