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BIT Conversions


BIT Conversions

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WayneS
WayneS
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Hugo Kornelis (8/14/2012)
WayneS (8/14/2012)
One of the things that I'm trying to learn is to write better QotD questions. It looks like most that have responded here about missing it have acknowledged not reading the question carefully. So, how could this question have been written better?

(The only thing that I can think of is to have bolded the "as a true / 1 value".)


Hi Wayne,

I see nothing wrong with this question. As long as you take the time to read the entire question, I fail to see how one could misunderstand it.
Maybe people who misread the question were only flying over the text and making assumptions on what the question is?


That is exactly what I was aiming for. Thanks Hugo

Wayne
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bitbucket-25253
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One of the things that I'm trying to learn is to write better QotD questions. It looks like most that have responded here about missing it have acknowledged not reading the question carefully. So, how could this question have been written better?

(The only thing that I can think of is to have bolded the "as a true / 1 value".)

Wayne


Might I suggest that it would have been clearer for myself, and maybe for others, if the wording was:

"How many of these values will be inserted as a 1 into the BitVal column ?"

If everything seems to be going well, you have obviously overlooked something.

Ron

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Tom Thomson
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Hugo Kornelis (8/14/2012)
WayneS (8/14/2012)
One of the things that I'm trying to learn is to write better QotD questions. It looks like most that have responded here about missing it have acknowledged not reading the question carefully. So, how could this question have been written better?

(The only thing that I can think of is to have bolded the "as a true / 1 value".)


Hi Wayne,

I see nothing wrong with this question. As long as you take the time to read the entire question, I fail to see how one could misunderstand it.
Maybe people who misread the question were only flying over the text and making assumptions on what the question is?


+1

Definitely nothing wrong, no trick, no ambiguity, and absolutely straightforward wording.

Tom

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I have to agree that this was a great question and don't see how it could be interpreted any other way. I think the "trap" may have been people knowing how the bit data type behaves in SQL Server and reading only what they wanted to read in the question. I'll admit, I saw it was a bit data type then read "which of the following values will be inserted" and almost went directly to answering without finishing the question since I was familiar with bit conversions. Fortunately I stopped myself, read the ENTIRE question, then answered.
tilew-948340
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Easy question as I had to face it in my programming some time ago!
Thanks!
EL Jerry
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L' Eomot Inversé (8/14/2012)
Hugo Kornelis (8/14/2012)
WayneS (8/14/2012)
One of the things that I'm trying to learn is to write better QotD questions. It looks like most that have responded here about missing it have acknowledged not reading the question carefully. So, how could this question have been written better?

(The only thing that I can think of is to have bolded the "as a true / 1 value".)


Hi Wayne,

I see nothing wrong with this question. As long as you take the time to read the entire question, I fail to see how one could misunderstand it.
Maybe people who misread the question were only flying over the text and making assumptions on what the question is?


+1

Definitely nothing wrong, no trick, no ambiguity, and absolutely straightforward wording.

I also agree there is nothing wrong with it. We must read and analyze the question.

Great question, Wayne!!

"El" Jerry.

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Good job Wayne - good question.

Jason...AKA CirqueDeSQLeil
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Nadrek
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Thomas Abraham (8/14/2012)
Excellent question. I particularly like questions, like this one, that highlight areas where the behavior is not as one might think, or is different than you might find in other languages. These are the gotchas that you have to know. Thanks!


Agreed. SQL syntax is essentially old C syntax - 0 is false, nonzero is true.
buntyteg
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in correct answer -1,1 is correct

but how 25 is correct

means to say... in bit datatype how we can store 25 (2 digit) value

??????
Hugo Kornelis
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buntyteg (8/14/2012)
means to say... in bit datatype how we can store 25 (2 digit) value

No. Any value other than 0 is converted to 1. So 1 is stored as given, and both -1 and 25 are converted to 1. (Which, by some tools, is interpreted and shown as true).


Hugo Kornelis, SQL Server/Data Platform MVP (2006-2016)
Visit my SQL Server blog: http://sqlblog.com/blogs/hugo_kornelis
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