In this chapter, we have covered a lot of advanced concepts such as altering tables, working with indexes and column characteristics, working with stored procedures, working with stored routines, and working with triggers. MariaDB offers many more advanced concepts and the concepts discussed in this chapter will lay a good foundation to acquire a better understanding of the more advanced database concepts. Now that we have talked about a few advanced concepts of MariaDB, let's switch gears and dive in to understand a popular programming paradigm called object-oriented programming and understand its implementation in PHP 5.