Your database can be automatically saved and archived every hour and/or every day, and backups can be emailed to the address you specify. You can also restore the data to your WP DB or an external DB, which makes copying your database to another server and easy task.
Updated March-13th

EZ Backup

Keep your database safe with scheduled backups. Multiple option for off-site backups also available.

joseph

This plugin connects WordPress and the MY_SQL database, thus allowing a user fetch data from the MY_SQL database, a user can display a table or perform a simple ‘UNION’ on two tables. Copy shortcode to use in any page.
Database Operations supports the following features
<ul>
<li>Can automatically connect to WordPress database</li>
<li>Can perform simple queries on the WordPress database</li>
<li>Can perform advanced queries on the database</li>
<li>Works on old and new versions of wordpress</li>
<li>Comes with handy widgets option and shortcodes </li>
<li>Can support multiple themes </li>
<li>Shortcodes support</li>
<li>Charts and graphs option</li>
</ul>

Database Operations

Database Operations Plugin. Display MY_SQL tables and perform MY_SQL set operation.

EZ Backup vs Database Operations