Dimitri Gielis — Oracle APEX & Database

Upgrade APEX 24.1 app to APEX 26.1

Thu, 28 May 2026 07:19:08 GMT

Moving forward building Oracle APEX applications, you want to make sure your apps are compatible with APEXlang.

Oracle Database 26ai Assertions in a World Cup Betting App

Sat, 14 Mar 2026 08:00:00 GMT

Recently I was playing again with my World Cup betting application, originally built in 2006 with Oracle APEX. Yes… almost 20 years ago already!

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Oracle APEX 25.1 and beyond

Wed, 15 Oct 2025 15:17:55 GMT

Why there is no Oracle APEX 25.1 yet, and what Oracle showed at Kscope about the next release: APEXlang, AI-generated apps, AI in Interactive Reports, a new Advisor and features for large teams.

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Making File Upload required in Oracle APEX

Wed, 24 Jul 2024 02:42:01 GMT

Making the File Upload a required field is difficult with APEX 24.1 or earlier. In this post, I will show you the solution I use until Oracle APEX's native behavior improves.

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ORDS - SQL Developer Web: Fix Invalid credentials

Wed, 22 Nov 2023 18:42:03 GMT

I had a weird issue with some Oracle database users I wanted to connect to in SQL Developer Web.

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A story about Joel and APEX Office Print (AOP) #JoelKallmanDay

Wed, 11 Oct 2023 14:39:47 GMT

Since this is the special Joel Kallman day, I thought to share a story about how document generation with AOP started at Oracle's internal APEX environment.

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Compare 2 Oracle APEX pages

Tue, 15 Aug 2023 11:37:11 GMT

I wanted to know if a page was the same within the same application. Two (+1 in Oracle APEX 22.1+) features in Oracle APEX help to compare pages, which you find under the tools menu: Checksum and…

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The application alias "X" can not be converted to a unique application ID.

Fri, 04 Aug 2023 16:55:57 GMT

You get this error when two or more Oracle APEX applications have the same alias.

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Oracle APEX: the Power of the Activity Logs

Wed, 22 Feb 2023 15:00:56 GMT

Have you ever had those moments when an end-user calls you out of the blue with a disturbing message about your app?

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Fix for ORDS connection pool named |default|lo| is not able to proxy to the schema

Fri, 13 Jan 2023 18:37:10 GMT

Today on our server running ORDS 22.4 and Oracle APEX 22.2 we had a weird error: The database user for the connection pool named |default|lo|, is not able to proxy to the schema named ET_DEV.

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Restarting to blog

Sun, 01 Jan 2023 20:23:35 GMT

At the beginning of the year, I tend to reflect on the last year(s). When looking back this year I realized that in the last 15 years things changed in the amount I blogged.

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