By Denio Flavio Garcia da Silva After more than 15 years working with PL/SQL, I still managed to find a feature that genuinely surprised me. I ran into it while preparing for the PL/SQL certification exam (1z0-149), which was easily the hardest Oracle certification I have taken so far. I passed with 66.2%, just above…
By Dênio Flávio Garcia da Silva There was a moment in my journey with Oracle APEX when I started working on larger enterprise applications and realized that the page itself was often the simplest part of the whole system. The UI looked clean and straightforward, but behind a single button there were packages with hundreds…
In this video, I built and recorded a practical Oracle APEX demo showing how to handle long-running tasks without freezing the UI. The app starts a background Execution Chain (Init → Process → Finalize), returns control to the user immediately, and displays live progress on a Monitor page (status, “X of Y”, messages, and item-level…
By Dênio Flávio Garcia da Silva There are certain problems in enterprise applications that only show up after a system has been in production for a while. They don’t appear during development, they don’t fail loudly, and they don’t generate stack traces. They just quietly corrupt user expectations. One of those problems is concurrent editing….
In this article, I demonstrate how to secure ORDS REST endpoints using OAuth2 Client Credentials within Oracle APEX running on Autonomous Database (OCI). The post walks through creating roles and privileges via the APEX RESTful Services interface, configuring an OAuth client using SQL Workshop, and validating the full authentication flow using Postman. This example highlights machine-to-machine security architecture and best practices for protecting exposed ORDS APIs.
In this video, I demonstrate a practical Oracle APEX dashboard pattern that uses a single Dynamic Action combined with a jQuery selector to refresh multiple regions at once. The demonstration starts with a simple page containing filters and one report region refreshed by a button. As the page evolves into a real dashboard with multiple…
Using a simplified shopping cart XML example, the content shows how to safely modify an XML element while properly handling namespaces and following the required copy / modify / return pattern defined by the XQuery standard.
The example intentionally reflects real-world constraints, where the XML is already stored as CLOB and changing the data model to XMLTYPE is not an option. The focus is on clarity, maintainability, and correct usage of supported Oracle XML features rather than deprecated functions.