Dive into a comprehensive PHP tutorial focused on creating MySQL database tables. Learn essential concepts including data types, primary keys, foreign keys, and table relationships. Explore SQL data types, understand the difference between SIGNED and UNSIGNED, and create your first table step-by-step. Discover the importance of PRIMARY KEYs and how to implement them effectively. Progress to creating a second table and understand the concept of FOREIGN KEYs. Finally, delve into the ON DELETE clause and its significance in maintaining data integrity. With detailed explanations and practical examples, gain the skills needed to design and implement robust database structures for your PHP projects.