MySQL Advanced
3 Chapters
Aggregate Functions
Last Updated: December 2, 2025Aggregate functions operate on a collection of rows (a group) and calculate a single value that summarizes those rows. They...
Joining Tables (Relationships)
Last Updated: December 2, 2025In a well-designed relational database, data is normalized, meaning it is spread across multiple tables to avoid redundancy. Joins are...
Outer Joins and Views
Last Updated: December 2, 2025While the INNER JOIN is essential for combining matching data, Outer Joins are crucial when you need to include all...