Posts, pages and images disappeared – how to restore in GoDaddy

I have a GoDaddy site and the posts, pages and images disappeared at some point over the last few months.

I’ve checked with GoDaddy and they said it looks fine on their end. I’ve also switched themes and disabled all the plugins and that didn’t resolve anything.

I have an .sql backup of the database, but don’t know what to do with it. Help?

Any help would be appreciated.
Thanks