Hello -- I'm working on a double-major in computer science and data analytics and have worked on several PHP/SQL applications for fun and for work. Recently, for example, I've developed a simple family tree software with PHP and MySQL that pulls data from two separate tables using nested queries in order to solve the problem of how to display an individual, his or her spouses in order of marriage, and their respective children in order of birth. This is easily done with two tables, one for individuals and one for couples; each entry in the Individuals table has a unique ID, and each Couple entry has two fields with an Individual ID, as well as unique Couple ID of its own; each of that couple's children back in the Individuals table has a field that containing his parents' Couple ID. I use PHP to query this database and produce an HTML document displaying the data.
Since you'd be my first client on Freelancer.com, I'd give you a discounted rate of $18 per hour.