Chris Saxon, Oracle Developer Advocate for SQL
Chris Saxon is an Oracle Developer Advocate and quizmaster on Dev Gym. His job is to help you get the best out of the Oracle Database and have fun with SQL! He's also part of the answer team on Ask TOM and creates YouTube videos at The Magic of SQL channel.
Steven Feuerstein, Developer Advocate for PL/SQL
Steven Feuerstein is a Senior Advisor at Insum Solutions (https://insum.ca), and is obsessed with the Oracle PL/SQL language, having written ten books on it (all published by O'Reilly Media). You will find an abundance of quizzes from Steven at the Dev Gym. Enjoy!
ToonKoppelaars, Consulting Member of Technical Staff
Toon has been part of the Oracle eco-system since 1987. He is currently a member of Oracle's Real-World Performance team. The RWP-team troubleshoots application performance issues in and around the DBMS. The way applications currently use the DBMS, is often at the root of these performance issues. Prior to joining the RWP team, Toon has been mainly involved in database application development. His special interests are: architecting applications for performance and scalability, database design, and business rules / constraints modeling (see his idea on SQL Assertions here https://community.oracle.com/ideas/13028). He is a long-time champion of the Smart Database paradigm, i.e. using the database as a processing engine, and not just as a persistence layer.