SQL database defined

I want to verify that I understand exactly what the “SQL Database” is before I do my backup. As I understand it, that’s the text or ‘blog’ data that I have on my website. All the rest of the stuff in Public_html has to do with theme and how I have things set up in general. I have limited downloads, and backed up the entire SQL and Public_html in Sept. The only things that have changed since then are the additional text I’ve added. Can I get away with just backing up the SQL files?

You are dealing with a real ignorant person here. I’m even too ignorant to make sense of trying to search for this info. I appreciate the help.