phpmyadmin

Phpmyadmin is a free database management tool, intended to handle the administration of MySQL.

It allows managing databases, tables, users, permissions and performing other changes to your databases via the user interface where you still have the ability to execute SQL query if needed:

It has become one of the most popular web-based database management tools.

Operations tab allows to create new tables, rename or copy the database, change the collation.

Operations tab for the table gives you access to all the basic Alter table functions, like changing or deleting the existing values, altering MySQL table order, renaming, moving or copying the table:

It is also good for backing up your information and making changes like disabling plugins or resetting the login details for your website in case the changes can not be made in your site admin panel or the site is broken.

Such changes can also be made via the MySql commands, but doing it is not an option for not experienced users.

Hosting control panels like cPanel and Plesk have this tool pre-installed:

You can also follow this instruction to install it.