Daniel Overby Hansen's Avatar

Daniel Overby Hansen

@dohdatabase.com

Distinguished Product Manager for Database Upgrade, Migrations, and Patching at Oracle. Views expressed are my own.

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15.11.2024
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Latest posts by Daniel Overby Hansen @dohdatabase.com

Catch up or sharpen your "DBA-Linux" skills with these short educational videos from my colleagues over in the Linux dept.

www.youtube.com/watch?v=7bq4...

10.03.2026 06:17 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I saw this movie as a kid in the cinema. I watch it again at every occasion.

Still makes me so sad that he never gets to see Montana. 🫣

06.03.2026 05:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It's always 42 πŸ˜‚

05.03.2026 09:31 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Upgrade Oracle Database 19c PDB to 26ai using Refreshable CloneΒ PDB Here’s how to upgrade a single PDB using refreshable clone PDB. It’s a faster approach with an excellent rollback option; it preserves the source PDB.

Here’s how to upgrade a single PDB using refreshable clone PDB. It’s a faster approach with an excellent rollback option; it preserves the source PDB.

24.02.2026 06:26 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Upgrade Oracle Database 19c PDB toΒ 26ai Here's how to upgrade a single PDB. It's a faster approach, but consider your rollback options.

Upgrading a single PDB is a faster and more flexible option compared to a full CDB upgrade. But take about on your rollback plan.

17.02.2026 15:02 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

You REALLY want to win when you're willing to inject acid into your private parts. 😳🫣

07.02.2026 04:02 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Looks like a beautiful wintery day. Dun and frost is a heavenly combination.

05.02.2026 06:53 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Upgrade Oracle Database 19c Non-CDB to 26ai and Convert to PDB with Data Guard and Reusing Data Files (EnabledΒ Recovery) Here's how to upgrade your 19c non-CDB to Oracle AI Database 26ai when you have Data Guard and want to re-use the data files and go live faster.

Here's how to upgrade your 19c non-CDB to Oracle AI Database 26ai when you have Data Guard and want to re-use the data files and go live faster.

27.01.2026 06:09 πŸ‘ 3 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Fully agree. However, some people argue that it brings validity to what you present (if you're unknown to the audience). But I agree that you should let the content decide how good you are.

20.01.2026 15:31 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Yeah. The missing eye contact triggers me too.
Plus, you can really tell when someone know what they're talking about and have trying it multiple times.

20.01.2026 15:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'll start.

Very lengthy introduction of the speaker themselves and the company that they work for. If it lasts several minutes, there's big chance you lost me already.

20.01.2026 11:26 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

What's the worst a speaker has put you through?

I'm doing a presentation on public speaking and I'd like some example of what not to do. What do you think should be banned from public speaking or presentations?

20.01.2026 11:26 πŸ‘ 0 πŸ” 0 πŸ’¬ 5 πŸ“Œ 0
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Free Upgrade/Patching/Migration Workshops In Denmark, Sweden andΒ Finland A full-day, in-person workshop for free. All tech, no marketing!

A full-day, in-person workshop for free. All tech, no marketing!

20.01.2026 08:26 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

I remember using it for a central database to which hundreds of other databases would connect via a database link. Each "client" database could have many open connections since it was dedicated database links.
This lead to running out of processes on the central database (PROCESSES parameter).

20.01.2026 06:25 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'd like to go. Can you approve a flight for me?

16.01.2026 07:52 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Brand-new monitors from Samsung today. Nice 27" ones. Built-in USB-C hub, ethernet, plus tons of USB-A. But not a single USB-C outlet... What on earth! That's just ridiculous.
Yes, I should have done my homework, but come one. Who would produce such stuff today! 🫣😑

15.01.2026 12:34 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Ahhh, I see. It would be nice with an Oracle library somewhere where all this would be stored (and easily searched). But I guess that comes with tons of problems and considerations.

14.01.2026 11:16 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Why do you think it's disappointing? I see that good knowledge getting lost is sad, but as people retire or leave the tech space I understand that they don't want to pay the fee for hosting a webpage.

14.01.2026 09:18 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Interesting...

12.01.2026 20:57 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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WordPress, Your Way Create your site. Share your voice. Earn online.

Sure looks like it. But I don't know. I just grabbed it from a bunch of free photos on wordpress.com.

12.01.2026 08:00 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Upgrade Oracle Database 19c Non-CDB to 26ai and Convert to PDB with Data Guard and Restoring Data Files (DeferredΒ Recovery) Here's how to upgrade your 19c non-CDB to Oracle AI Database 26ai when you have Data Guard and want to re-use the data files (the easy, but slow way).

Here's how to upgrade your 19c non-CDB to Oracle AI Database 26ai when you have Data Guard and want to re-use the data files (the easy, but slow way).

12.01.2026 06:00 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Upgrade Oracle Database 19c Non-CDB to 26ai and Convert to PDB Using Refreshable CloneΒ PDB Here's how to upgrade your non-CDB to Oracle AI Database using refreshable clone PDB. This method preserves the source database for rollback if needed and minimizes downtime by copying data files in advance.

Upgrade your non-CDB to Oracle AI Database using AutoUpgrade and refreshable clone PDB. This method preserves the source database for rollback if needed and minimizes downtime by copying data files in advance.

My absolute favorite!

08.01.2026 06:00 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Upgrade Oracle Database 19c Non-CDB to 26ai and Convert toΒ PDB Use these step-by-step instructions and AutoUpgrade to bring your non-CDB safely to Oracle AI Database 26ai

Use these step-by-step instructions and AutoUpgrade to bring your non-CDB safely to Oracle AI Database 26ai

05.01.2026 06:19 πŸ‘ 3 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
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Important Things after Upgrading to Oracle AI DatabaseΒ 26ai You made it! You've upgraded your database. But before allowing users back in, let's do a few final touches.

You made it! You've upgraded your database.

But before allowing users back in, let's do a few final touches. For instance, what about those optimizer fixes that are turned off?

29.12.2025 06:48 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Install a New Oracle home for Oracle AI DatabaseΒ 26ai You need to download software and patches plus install a new Oracle home before you can upgrade. AutoUpgrade does all that with just two commands.

You need to download software and patches plus install a new Oracle home before you can upgrade. AutoUpgrade does all that with just two commands.

22.12.2025 06:39 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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a cartoon of homer simpson standing in a grassy yard ALT: a cartoon of homer simpson standing in a grassy yard

Oh... I'm REALLY late to the party 🀦

19.12.2025 07:49 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Joking aside. I've seen some pretty mind blowing enhancements coming out when a DBA and a developer sit together.

... but we need something else to yell at.

19.12.2025 07:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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a cartoon of homer simpson is holding a newspaper that says old man yells at cloud ALT: a cartoon of homer simpson is holding a newspaper that says old man yells at cloud

If I can't yell at developers anymore, whom can I yell at?

19.12.2025 07:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

If a clause on a broker command was deprecated in 11.1, it means that the broker must be much older than that. Oh wow 🫒

I only found out about it and started using it in like 12.2. Man, I was late to the game... 🫣

P. S. Don't tell anyone, please

19.12.2025 05:42 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

If you were playing "All I want for Christmas" on the other hand 🀩

18.12.2025 13:07 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0