Change WordPress Database Table Prefix One Click To Improve Security.
Changing or renaming WordPress MySQL database table prefix easier. If you followed the WordPress automatic installation method, most of the time your table prefix has wp_. In order to maximize the security, it’s better use a custom table prefix.
Written step by step tutorial: – http://goo.gl/kEQnKm
Backup Database:- https://www.youtube.com/watch?v=4pQQ1_ouiHU