Erik van Roon's Avatar

Erik van Roon

@evrocs

- Oracle DB Dev - Oracle ACE Pro ♠️ - Symposium42 - https://sym42.org/ - Rambling fool By default assume I'm not serious Tweeted opinions are the one & only truth, and probably unfounded

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16.08.2023
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Latest posts by Erik van Roon @evrocs

Preview
Assertions for data integrity on a less-than-ideal data model 25-30 years ago I worked a lot with the Danish developed ERP system called Concorde XAL. It ran on top of a database (choice of several, mos...

Assertions for data integrity on a less-than-ideal data model.

www.kibeha.dk/2026/03/asse...

Or "How I could have used assertions 25 years ago when I worked with Concorde XAL"...

#OrclDB #SQL #Assertions #OracleACE

06.03.2026 15:50 👍 6 🔁 5 💬 2 📌 1

😮

04.03.2026 15:52 👍 0 🔁 0 💬 0 📌 0

7? No way. Everything added after 5 is just hype.

25.02.2026 11:17 👍 2 🔁 0 💬 0 📌 0

Ah. Check! Missed that. Thanks.

25.02.2026 11:14 👍 0 🔁 0 💬 0 📌 0
Preview
a man with glasses and a beard says " it just makes me wanna try harder " ALT: a man with glasses and a beard says " it just makes me wanna try harder "
25.02.2026 11:03 👍 2 🔁 0 💬 0 📌 0

Well, actually...
After reading the blog post (again) I decided to watch the video too.
Glad I did. The underscore parameter isn't mentioned in the blog post.
(I fear that parameter is going to be set in many places 😢)

25.02.2026 10:58 👍 1 🔁 0 💬 2 📌 0

I'm pretty happy with this, as I have run into people who did not solve the problem by using proper datatypes but by a rock solid rule: "don't ever use searched case".
That won't work anymore.

OTOH, they might just change the rule to "26 broke case expressions, don't ever use case" 😢

25.02.2026 09:01 👍 2 🔁 0 💬 1 📌 0

I get the feeling there are people in this world you like even less than me 😮

24.02.2026 22:25 👍 1 🔁 0 💬 1 📌 0

Aha. So two identical records in the resultset.
Of course.
Thanks.

19.02.2026 12:26 👍 1 🔁 0 💬 0 📌 0

Looks good.
But why "rownum=1"? I would expect only 1 of the queries to return only 1 row. Even if it's 'just to be sure', it implies that more than 1 row *could* be returned, in which case the query needs an order by somewhere to ensure a consistent resultset.
Or am I missing something?

19.02.2026 12:13 👍 0 🔁 0 💬 1 📌 0

If you exclude the redacted parts from your calculations, you're left with a little over a workday, though.

31.01.2026 09:47 👍 1 🔁 0 💬 0 📌 0

📣 26ai is now available for download, x86-64 bit Linux distributions.

www.oracle.com/database/tec...

27.01.2026 17:52 👍 9 🔁 2 💬 0 📌 0
Cross table constraints with SQL assertions
Cross table constraints with SQL assertions YouTube video by Oracle Developers

www.youtube.com/watch?v=dNvI...

27.01.2026 17:54 👍 7 🔁 4 💬 0 📌 0

Finally...

27.01.2026 17:19 👍 2 🔁 0 💬 0 📌 0
Oracle AI Database New Features This book describes the new features in Oracle AI Database 26ai.

It's here at last!

Oracle AI Database 26ai (23.26.1) Enterprise Edition for Linux x86-64 on premises is GA

Once again, there's a host of #SQL updates in this RU. Here are a few to get you started:

27.01.2026 17:10 👍 5 🔁 1 💬 1 📌 0

You have a weird definition of the word "friend"

27.01.2026 12:28 👍 2 🔁 0 💬 0 📌 0

I can hardly wait to get my hands on this.....

22.01.2026 08:56 👍 5 🔁 0 💬 0 📌 0
Preview
Software quality – Grok and my friend’s boat You might be wondering how a friend’s boat has any relation to the topic of software quality, but bear with me – we’ll get there in a second. But first, if you’ve got a Twit…

"It doesn't matter if AI spoke to an Agent which spoke to your Uncle Mike whose used his iPad to inscribe COBOL onto a parchment that was attached to a carrier pigeon...It is still your code"

connor-mcdonald.com/2026/01/04/s...

04.01.2026 02:33 👍 6 🔁 5 💬 2 📌 1

Also, without exception, while creating that MVP the definition of "Minimal" shifts into something completely different than I was ever taught.

24.12.2025 08:03 👍 1 🔁 0 💬 0 📌 0
Preview
Tiny but mighty new SQLcl feature Last week, a new version of SQLcl was released, SQLcl 25.4. The release contains a lot of cool new features, but there is one tiny one in it that came thanks to yours truly. Of course, I can only take credit for filing an enhancement request, tracking down the Dev manager, and pestering him until he kindly agreed. And truthfully, it didn't really involve pestering.

Best Christmas 2025 present ever! 🙌

The new #SQLcl release brings a tiny but mighty new feature! Goodbye pesky little line numbers! 🧹

A shoutout to the SQLcl Dev team to get this in! 👍

23.12.2025 14:01 👍 11 🔁 4 💬 0 📌 0

You're trying to tell me, when I retire I'm still expected to waste my time on other people?
In that case I'd better continue to keep working. At least I'll get paid for that nonsense.

20.12.2025 00:05 👍 2 🔁 0 💬 1 📌 0

Oracle SQLcl Version 25.4 is available, NOW.

Improvements for both 👩‍💻 and 🤖!

17.12.2025 16:39 👍 5 🔁 4 💬 0 📌 0

I'm very much hoping it wil be in 23.26.1

04.12.2025 13:55 👍 1 🔁 0 💬 1 📌 0
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I ... am ... pumped....

03.12.2025 22:02 👍 6 🔁 3 💬 2 📌 0
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Heading out on the Oracle ACE Adventure to Cadbury World

30.11.2025 09:58 👍 11 🔁 1 💬 3 📌 0
Speaker dinner dcd25

Speaker dinner dcd25

Speaker dinner dcd25

Speaker dinner dcd25

Speaker dinner dcd25

Speaker dinner dcd25

Speaker dinner dcd25

Speaker dinner dcd25

A little pre fun for (some of) our speakers and organisation for the #dcd25 day at our speakers dinner.

They all can't wait for tomorrow!

#thankyou #oracle #octemea25

12.11.2025 20:35 👍 11 🔁 5 💬 0 📌 0

Go to apexworld.nloug.nl to submit your abstract

12.11.2025 09:25 👍 1 🔁 1 💬 0 📌 0
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Full house for @evrocs.bsky.social talking about sqlcl at #DOUGDay2025

@oracleace.bsky.social @sym42.bsky.social

05.11.2025 13:33 👍 5 🔁 2 💬 0 📌 0
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Developers' track at #DOUGDay2025 is very popular. It must be because of the topic - SQLcl - or the speaker @evrocs.bsky.social

@oracleace.bsky.social @sym42.bsky.social

05.11.2025 13:39 👍 6 🔁 2 💬 0 📌 0
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The developer track of #DOUGDay2025 starts of with @evrocs.bsky.social explaining all about #SQL Macros

05.11.2025 10:10 👍 3 🔁 2 💬 0 📌 0