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April 8, 2011 at 2:36 am

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ashvini.hajari SSC-Addicted Points: 434 More actions · Answer 1

In question i think there should be nchar instead of nvarchar then the answer will be correct

SQLRNNR SSC Guru Points: 281334 More actions · Answer 2

mohammed moinudheen (4/7/2011)
Books online reference below.
nvarchar [ ( n | max ) ]
Variable-length Unicode character data. n can be a value from 1 through 4,000. max indicates that the maximum storage size is 2^31-1 bytes. The storage size, in bytes, is two times the number of characters entered + 2 bytes. The data entered can be 0 characters in length. The ISO synonyms for nvarchar are national char varying and national character varying.
ms-help://MS.SQLCC.v10/MS.SQLSVR.v10.en/s10de_6tsql/html/81ee5637-ee31-4c4d-96d0-56c26a742354.htm
Answer should be 6.

The correct answer is 4 - run the code.

Jason...AKA CirqueDeSQLeil
_______________________________________________
I have given a name to my pain...MCM SQL Server, MVP
SQL RNNR
Posting Performance Based Questions - Gail Shaw[/url]
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dawryn SSCertifiable Points: 5399 More actions · Answer 3

Shocked again :sick: total mismatch between question and answer :exclamationmark:

Black_Knight SSCrazy Points: 2031 More actions · Answer 4

Ho-Hum Question about one topic, answer about another.... Explains why i got it "wrong" Seems to me however, that it is the published answer that is wrong for the question....

we wait and see...

ambigla Valued Member Points: 54 More actions · Answer 5

Agreed, either the question should be changed to use NCHAR or the answer should be updated to correctly be 4. We're CS people, accuracy and correctness is important in our lives! 😉 I'm sure I'm not the only one irked by the fact that the question is blatantly broken (see what I did there, that alliteration? Awesome eh?).

The answer is definitely not 6, it must be a result of the DATALENGTH() function not of DB storage.

Since I posted my answer another 50+ people have all answered and suffered through it 🙁

ashu.atk13 Newbie Points: 2 More actions · Answer 6

ashu.atk13

Newbie

Points: 2

April 8, 2011 at 12:21 am

#1308981

Wake up and then post a question.

prashantb_pawar Grasshopper Points: 20 More actions · Answer 7

Answer is completly Wrong

declare @a nvarchar(30)

set @a='aa'

select datalength(@a)

Answer as per sql server is 4

sunitkrishna SSCrazy Points: 2233 More actions · Answer 8

I too have answered it as '4',but the answer is based on nchar(30) whereas the question is for nvarchar(30).This is really unfair to all those who answered '4' instead of '60'.

---
Thinking is the hardest work there is, which is the probable reason so few engage in it.

Sunitha
😎

itsmatta SSC Enthusiast Points: 117 More actions · Answer 9

For your code shown below I totally disagree with your answer

declare @a nvarchar(30) -- See the Difference

set @a='aa'

select datalength(@a)

Explanation: u have declared Variable-length Unicode character data and the answer for your above code is 4

Justification: The storage size, in bytes, is two times the number of characters entered + 2 bytes -- for nvarchar

If you have posted the code as shown below then your answer is correct and I Agree.

declare @a nchar(30) -- See the Difference

set @a='aa'

select datalength(@a)

Explanation: If you have declared Fixed-length Unicode character data of n characters then the answer is 60 and you are correct

Justification: The storage size is two times n bytes -- for nchar.

Conclusion: My Answer is Correct

Advice: Before you post this type of question(s), I would Advice you to verify the answer twice or thrice.

Regards,

Lakshmikanth

Project Lead

Imran Ashraf-452633 SSCommitted Points: 1969 More actions · Answer 10

Question and answer don't match up, I answered 4 based on the question to only find out that I was wrong but sure that I was right. Entering the forum I see I am not the only one that got it wrong.

Can I get my point now please....

😀

JBregman Right there with Babe Points: 768 More actions · Answer 11

Steve, are you responsible for QoD selections? Shame on you!

Jaap.

If you cant do things the way they must be done, do them the way you can ...

Stuart Davies SSCoach Points: 19505 More actions · Answer 12

Like most others I would say 4 - surprised at what the answer "should" have been.

Ran the code against different servers 2005, 2008 , 2008 R2 (in case that made a difference) and got

4 every time.

set childish_tanrum on

want my points!

set childish_tanrum off

-------------------------------Posting Data Etiquette - Jeff Moden [/url]Smart way to ask a question
There are naive questions, tedious questions, ill-phrased questions, questions put after inadequate self-criticism. But every question is a cry to understand (the world). There is no such thing as a dumb question. ― Carl Sagan
I would never join a club that would allow me as a member - Groucho Marx

paul s-306273 SSChampion Points: 10727 More actions · Answer 13

I'm take aback by the fact this question made it on to the site.

Come on Steve, you seem to be letting any Tom, Dick and Harry set questions.

shaycullen Right there with Babe Points: 781 More actions · Answer 14

Good question - pity the answer was given was wrong :-). Alas folks we're not robots and everyone is allowed a mistake...