Below are some links which anybody can use to learn SQL Database Administration
www.sqldbpool.com
www.sqlandme.com
www.careerride.com ( for interview questions )
www.learnsqlwithbru.com
http://www.sqlservervideos.com/ ( good one for learning with videos )
http://www.databasedesign-resource.com/sql-server-dba.html ( good one topic wise )
http://www.sqlserverspecialists.com/ ( advance )
www.sqlocean.com ( its a dedicated search engine for SQL Server )
How do I SQL Server Videos:
https://technet.microsoft.com/en-us/sqlserver/dd353197