In my view, the best way to make sure your that is fix hacked wordpress database is through using a WordPress backup plugin. This is a fairly inexpensive, elegant and easy to use way to be certain that your site is available to you.
I might find it a little harder to crack your password if you're one of the ones that are proactive. But if you're among those ones, I might get you.
Yes, you want to do regular backups of your website. I recommend at least a weekly database backup and a monthly "full" backup. More. Definitely, if you make changes and regular additions to your website. If you have a community of people that are in there all the time, or make changes multiple times a day, a daily backup should recommended you read be a minimum.
Another step to take to make WordPress secure is to upgrade WordPress to the latest version. The reason behind this is that with each new upgrade there also come fixes for security holes that are old making it essential to update early.
However, I recommend that you install the Login LockDown plugin as opposed to any.htaccess controls. That will stops login requests from being permitted from a specific IP-ADDRESS for an hour or so after three failed login attempts. If you accomplish this, it is still possible to access your mobile while and yet you have good protection against hackers.