Patrick Barel is a PL/SQL Developer for Qualogy [http://www.qualogy.com/] in the Netherlands. Besides working with SQL and PL/SQL he wrote different plug-ins [http://bar-solutions.com/] for PL/SQL Developer [http://www.allroundautomations.com/]. He publishes articles on his own blog [http://blog.bar-solutions.com/].
His twitter handle is @patch72. You can find him on LinkedIn at http://www.linkedin.com/in/patrickbarel.
In 2023 he published his first book: Modern Oracle Database Programming [https://www.amazon.com/Modern-Oracle-Database-Programming-Powerful/dp/1484291654]