I was most comfortable with SQL becauase, like I mentioned, I had to learn it for a junior level class. That said, learning how to use it in conjunction with PHP was definitely the hard part. PHP form entry into the database using the mysqli_connect was very interesting because I got to see firsthand how data gets stored into a database from user entry. It is something that get's taken for granted but every single time someone enters a webpage, data is stored and people might not realize just how much they put informatino into forms such as username and password.