Joan Casteel

About the Author

Joan Casteel is a seasoned educator and technical author with over two decades of experience in database management and SQL programming. Holding advanced degrees in computer science, she has taught at leading universities and consulted for major corporations on optimizing Oracle database systems. Her practical approach to complex topics has made her a trusted voice in the field of relational databases. Through her writings, Casteel demystifies SQL for beginners and experts alike, emphasizing real-world applications and best practices. When not immersed in code or classrooms, she enjoys hiking in the Pacific Northwest and mentoring aspiring tech professionals. Her work continues to empower readers to harness the power of data in an increasingly digital world.