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.

Yuya Hoshino

How it works:
<ol>
<li>
Click ‘Tools > Clone Test DB’.
</li>
<li>
Enter the ‘Test site address’.
</li>
<li>
Select ‘Test database name’.
</li>
<li>
Click ‘Create a clone site’.
</li>
</ol>
<ul>
<li>To view the test site, you will need to transfer files.</li>
<li>Sorry, multi-site is not supported.</li>
</ul>

Clone Test DB

It's a five star plugin just because it works as advertised, and it's easy to use it even though it has it's limitations, and you have to take a couple if (easy) steps.

1. Before cloning the database, edit the target folder's wp-config.php file, and change the database name to the target one (new installation's database). This is the code define( 'DB_NAME', "YOUR_DATABASE_NSME_HERE" );

2. After you clone the database, and if the cloned site is displaying a 404 (page not found) on the posts, pages, cpt, then log in to the backsite, and flash (update) the permalinks, this will solve the 404 errors.

Ok now the limitation: There is only one, and it is the fact that both websites HAVE to be on the same server, you cannot have a localhost -> live situation or vice versa for example, I hope the ability to log in into external databases will be added soon.



It's getting the job done.

Duplicate the table in another database and optimize it as a test site.

EZ Backup vs Clone Test DB