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Actually, the same sort of thing happens in floating point arithmetic, in pretty much any language under the sun. The values NaN (yes, there's more than one type of NaN) always return false when compared with any other number. So both NaN==x and NaN != x are false. etc., etc.
This has bitten me in the arse a number of times, and I work in C++.
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Chris Maunder wrote: to get the correct result.
The other result was also correct, just not the one you wanted. The behaviour is logical.
Your last example would be very VB-ish, where a "NULL" value is treated like an empty string. In the database-world, an empty value does not mean an empty string.
..and it is not something recent, is it? :p
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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Eddy Vluggen wrote: The other result was also correct, just not the one you wanted
This is exactly why I love programming.
cheers
Chris Maunder
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My sarcasm meter just broke.
#SupportHeForShe
Government can give you nothing but what it takes from somebody else. A government big enough to give you everything you want is big enough to take everything you've got, including your freedom.-Ezra Taft Benson
You must accept 1 of 2 basic premises: Either we are alone in the universe or we are not alone. Either way, the implications are staggering!-Wernher von Braun
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I prefer the idiom...
(TableTwo.StringColumn <> 'value') or TableTwo.StringColumn is null
I find it a bit more readable (never really liked the name of the IsNull function).
"If you don't fail at least 90 percent of the time, you're not aiming high enough."
Alan Kay.
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It's either col equals null meaning a field with no value or you've got an epmty string
you can use
Select *
From Table
Where (col is null or col = '')
or IsNull method to find epty strngs and null values
_______________________________________________________________________________________________
Alec
programming[^] expert
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A guy who I used to work with had two infamous sayings. Sadly, he passed away a few years ago and left a huge gap here, but his wit and wisdom did not go to the grave with him. Two of the best:
~ If you're not causing production problems, you're not doing anything.
(supervisor-types weren't fans of that one)
~ IIWD2WISBD2U
* If it was difficult to write, it should be difficult to understand.
[This, coming from one of two Computer Engineering folks, with everyone else in the shop holding DP/business degrees.]
(Lazy developers who couldn't program their way out of a paper bag with a hole in it (or who had yet to master Google) were not particularly fond of that one)
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"Plans are like fishing nets - the more complicated they are, the more holes you will find in them."
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"I am root" - Displayed by a virus that a student at IPFW wrote and put on the school's network. It would constantly pop up in modal dialogs, rendering the computer unusable.
AFAIK he got expelled for the incident. He was to graduate that year as well.
What do you get when you cross a joke with a rhetorical question?
The metaphorical solid rear-end expulsions have impacted the metaphorical motorized bladed rotating air movement mechanism.
Do questions with multiple question marks annoy you???
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A company I used to work for had a GUI program that ran on windows 3.1 for editing labels..
The support manager used to say "it was nearer WYSICUB than WISIWYG"
WYSICUB = What you see is complete utter b****x
Thanks,
Robin.
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I think I work there. Everything at my current job -- ESPECIALLY the brand new systems are WYSICUB.
I'm going to start using that. Thanks for the laugh!
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I just realized I missed another one. We used to use PEBKAC. I just came upon PICNIC. Problem in Chair, not in Computer. Much nicer to say someone is a real PICNIC to work with!
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From long ago...WMTSU means 'we're making this stuff up'.
"Go forth into the source" - Neal Morse
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Are you sure the "S" stands for "stuff"? 
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Two spring readily to mind...
OWNER: Old W*nker Needs Early Retirement.
And a favourite from my photographic days, working in retouch labs:
PHOTOGRAPHER: Pig Headed Old Tosser Only Gets Respect After Proving He's Enormously Rich!
Danny
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MIL-T-FD41
Make It Like The Flippin' Drawing For Once
(From the days of pre-computer-ubiquity.)
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DILLIGAF
Do I Look Like I Give A F...inished this sentence yet?
LOMBARD
Lots Of Money But A Real D...head.
I have, in the past, referred to certain co-workers as "Errol Flynn" ... basically they f...k everything they touch.
www.CADbloke.com
The Broadcast Systems Documentation SYSTEM
"The mass of men lead lives of quiet desperation"
-Zen & the Art of Motorcycle Maintenance
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I am the DSJB: Departmental Sh!t-Job(*) Boy.
(*) Source control wizard (Visual SourceSafe, no less), build server admin, build process author, ...
Software Zen: delete this;
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Not tech related, but I did find it giggle worthy when the doctor told us that my wife needed T&A.
He meant "tonsils and adenoids removal", but I'm very immature 
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Haaaaa. A few years ago, I was travelling with some coworkers every other week for "knowledge transfer" (aka "you're on OUR turf now! do this grunt work you persnickety perfectionist group of code monkeys who have made our lives ") at our vendor's HQ. At their location, temp offices for remote managers who had come in to work were named after colors. "Joe is in the magenta office this week", etc. Conference rooms were named after gemstones: "2 PM code review in Sapphire room". And the nine project work areas were named after the planets.
We discovered we were *way* too juvenile to work in a place where every time we had to get up for coffee, lunch breaks, restroom, etc., we had to walk past Uranus. The jokes were plentiful, frequent, and totally immature.
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When people are wetting their panties over some perceived problem
"Who's going to die? Yeah, that's what I thought."
Which usually gets people to stop panicking and start thinking how we're going to solve this problem. Of course, it doesn't work for every application.
"They're either going to get over it, or die still pissed off."
More when dealing with idiots, and you have to give them a rebuke. When you're right, stand up for yourself.
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TLA - three letter acronym
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If it has more than three letters, it is an ETBA - Extended Three Letter Acronym.
(Or 'Abbreviation', if you prefer than.)
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CRM - Constantly Requires Maintenance
ISM (a wonderfully crappy tool from IBM that you have hopefully never had to use) - I S*&t Myself - because it s%&ts itself all the time.
Lotus Notes = Blotus Notes
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