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The demon subdomain, including my old website disappeared a while ago, but there is a copy from December 2018 on the Wayback machine starting at:
web.archive.org/web/2018121305…
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Jonathan Lewis
15K posts
Jonathan Lewis
@JLOracle
50 years using computers, 40 years freelancing, 35 years dealing with Oracle design and performance issues; mostly retired. Now tweeting at https://t.co/jgM903GCKq
London, UK Katılım Temmuz 2013
39 Takip Edilen9.7K Takipçiler
Jonathan Lewis retweetledi
Catchy title with no details about the route and actual data. What a scam.
Md Riyazuddin@riyazmd774
R.I.P. GOOGLE FLIGHTS IN 2026. R.I.P. BOOKING DOT COM IN 2026. R.I.P. SKYSCANNER IN 2026. $1,412 flight. I paid $186. These 7 ChatGPT prompts quietly break airline pricing:
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Boolean is finally coming! Here's how to make the leap!
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I'm on the agenda for the #ukoug conference 2025.
9:00 a.m. on Monday morning (I tell myself that that's to encourage people to be on-site early enough to attend the opening keynote afterwards)
jonathanlewis.wordpress.com/public-appeara…
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@orcldoug I'm sure that wasn't the way that Pavlov set up the experiment.
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Cats don’t need a button!
Puppies 🐶@Puppieslover
“I got my dog a button to press when he's hungry... BIG MISTAKE. I'm now his full-time slave”
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Jonathan Lewis retweetledi
YouTube
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Jonathan Lewis retweetledi
We are saddened by the passing of Jim Lovell, commander of Apollo 13 and a four-time spaceflight veteran.
Lovell's life and work inspired millions. His courage under pressure helped forge our path to the Moon and beyond—a journey that continues today. go.nasa.gov/41tbrpq
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@oraclebase @pdevisser It's a book where you don't know whether the next page is going to make you laugh, cry, wince, shake your head at the utter stupidity of people, or rage against the treatment of NHS staff by successive governments.
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@oraclebase @pdevisser Suggested reading: "This is going to hurt" by Adam Kay.
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I, for one, welcome our sinus cleaning micro-robot overlords!
Swarms of tiny nose robots could clear infected sinuses, researchers say
theguardian.com/science/2025/j…
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Two months since the last blog note, I hope it's worth the wait:
jonathanlewis.wordpress.com/2025/05/27/pag…
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Jonathan Lewis retweetledi
@lemire I think the more practical question (for now) is if a senior dev would end up producing junior level code when using AI agents?
(... having distractions and deadlines, etc...)
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Jonathan Lewis retweetledi
More than 3 months to #POUG2025 and we have 30 tickets left. Do you really want to miss over 40 tech sessions (no marketing! no sales pitches!) & opportunity to meet #Oracle stars like @connor_mc_d @JLOracle or @KerryOracleGuy ?
Buy now or cry later:
poug.org/edycja/poug-20…
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I've just come across a blog note I wrote a few years ago about unexpected (and unreliable) results from v$undostat when it reports the "maxquerylen / id"; it's probably worth knowing about it:
jonathanlewis.wordpress.com/2020/02/04/max…
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Jonathan Lewis retweetledi
@chris_skyflier @martinberx @OracleSK @JLOracle The days of running oradebug without restriction are numbered!
jonathanlewis.wordpress.com/2024/03/12/dis…
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@DineshParva Sorry, no. The optimizer was changing far too quickly for me to do all the testing and modelling to keep up to date with the possibilities.
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I'll be speaking at #POUG2025 (Sept 5th/6th). poug2025.konfeo.com/en/groups
The abstract for my session is the sole entry under the "Public Appearances" page on my blog:
jonathanlewis.wordpress.com/public-appea...
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Jonathan Lewis retweetledi
The old mathematical ones are the best.
Maybe jokes are like mathematics. You either get them or you don't. But if you need a clue for Vishal's joke, this might help:
en.wikipedia.org/wiki/Residue_t…
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Jonathan Lewis retweetledi
In case anyone in the US wonders why Australians live approximately 7 years longer on average than Americans… 🤷♂️ 🇦🇺 #TrumpTariffs
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Jonathan Lewis retweetledi
Calling out delusional developers...
connor-mcdonald.com/2025/04/03/spa…
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Jonathan Lewis retweetledi
@StewAshton @FranckPachot @gwenshap @connor_mc_d If your developers are talking about the database as «the Persistence Layer», you are in trouble 🥸
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