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.

tamlyn

WARNING: This plugin is for advanced users. If used incorrectly it could wipe out all your content!
Keeping databases in sync between development, staging and live servers can be a pain. This plugin lets you 
link together several WordPress installations by sharing a secret token. Once linked, administrators can pull 
or push the entire database between servers with just a click.
Currently syncs database only, not uploaded files.
<h4>Backups</h4>
The plugin will attempt to make local backups of the database before overwriting. These are stored as gzipped SQL 
files in wp-content/plugins/database-sync/backups/dbYYYYMMDD.HHMMSS.sql.gz The backups directory should be made 
writable, and you should keep an eye on it if you sync often as it will grow in size.
<h4>Usage</h4>
See Installation instructions.
<a href="http://outlandish.com" rel="nofollow ugc">Plugin by Outlandish</a>

Database Sync

Is this wizardry?  This plugin works so seemlessly it's amazing!  I love that it pulls the ACF stuff as well which is a huge time saver.  Another issue is the media uploads which this helps with as well.  Simply sync up the two databases and then ftp your uploads and both db's are in perfect lockstep!



WOW!

Sync databases across servers with a single click.

EZ Backup vs Database Sync