@petarchess
About
Hi, I'm Petar — a passionate Oracle APEX Consultant with years of hands-on experience building robust, scalable, and user-centric applications. From optimizing Service Desk and Document Management systems to launching APEX PWA apps on Google Play and the App Store, I bring deep expertise in Oracle APEX, PL/SQL, ORDS, and web technologies. As an Oracle ACE, I actively contribute to the Oracle community by blogging, mentoring, and speaking at international conferences like APEX World, APEX Alpe Adria, HrOUG, and MakeIT. I’m also a certified APEX Developer and Specialist with a strong focus on integrating AI services and mobile-first design into enterprise solutions. Tech Stack: Oracle APEX, ORDS, SQL, PL/SQL, HTML, CSS, JavaScript, jQuery Certifications: Oracle Cloud APEX Developer Professional, Oracle ACE Associate, Oracle Foundations Associate Currently: Delivering APEX projects and training sessions remotely.
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Petar Simic's blogs
Recently published
Oracle APEX: Faceted Search - External Page Item
Sep 23, 2025 · 2 min read · When working with Faceted Search in Oracle APEX, you might want more control over where certain search elements appear. For example, instead of being stuck in the default search area, you might prefer to place them in more user-friendly locations. Lu...
Join discussionOracle APEX: Tree Region Expand Selected Node Only
Mar 15, 2025 · 2 min read · Recently I was working with Tree region and some requests that are not declaratively available in APEX. So I discovered some useful APIs that I think is worth sharing. :) Expand Selected Node In APEX, we have Dynamic Actions to expand all and collaps...
SMohamed commented
Oracle APEX: Working with Row Selection in Interactive Grid
Feb 14, 2025 · 2 min read · The Interactive Grid (IG) in Oracle APEX provides a feature to select rows when edit mode is enabled. However, it comes with challenges such as: Retrieving all selected records Maintaining selected records between pagination pages Preselecting spe...
JJoe commented
Oracle APEX: Auditing User-Requested Data
Feb 11, 2025 · 3 min read · Recently, I was asked how to track the data displayed to users on Reports and Forms in Oracle APEX. The requirement was to prevent displaying any data before search/filter criteria are entered, and to limit the number of rows shown. After some resear...
VVincent commented