Is the answer correct?

[Sona Patel]

Hi...
I am reading about using 'order by' clause. I came across following question -

The results from an SQL query are shown here.

DEPTNO  DNAME             LOC
---------- -----------         ---------
10          ACCOUNTING  NEWYORK
40          OPERATIONS  BOSTON
20          RESEARCH    DALLAS
30          SALES         CHICAGO 

Which of the following SQL statements could not have produced this output?

A. select deptno,dname,loc from dept order by 2 asc, 1 asc, 3 desc;
B. select deptno,dname,loc from dept order by 3 asc;
C. select deptno,dname,loc from dept order by 2 asc;
D. select deptno,dname,loc from dept order by 2 asc, 3 asc, 1 desc;

I think correct ans is (B.). But book says it is (C.). What do you think?

[Jan Cumps]

Hi Sona,

If you put an exam question on the Ranch, you have to tell where you got the question from.

[Sona Patel]

Its from OCP introduction to oracle 9i by Jason Couchman...

[Fatih Keles]

Hi Sona,

I agree with you, and also my local 11g r1 database does.

Regards,

Fatih.

[Sona Patel]

Hey Fatih...

Thanks...
How ignorant of me...i forgot i can try it out. thanks for reminding me

Regards,

[Eric Pascarello]

Did you check the book's Errata? http://www.mhprofessional.com/downloads/osborne/products/0072195371/0072195371_errata.doc

Eric

[swapnil kachave]

order by 2 asc means it doing order by dname in ascending order.
if you check the alphabetic order of colom 2 you will find the answer c is right.
if you are saying the answer is (b) then check the order by statement which say order by LOC in ascending order. which is not in alphabeticall order so that answer (c) is right.

[Sona Patel]

Hi Swapnil...

Option (A),(C),(D) will produce the output as shown in the question.
Option (B) will not produce the same output right ??

Question is :
Which of the following SQL statements could not have produced this output?

So the ans is (B) could not have produced the same out put.

[swapnil kachave]

Sona Patel wrote:Hi Swapnil...

Option (A),(C),(D) will produce the output as shown in the question.
Option (B) will not produce the same output right ??

Question is :
Which of the following SQL statements could not have produced this output?

So the ans is (B) could not have produced the same out put.

Yes..
If you go for b then check the order by clouse where you specify the different column no and output not contain that column in sorted oreder

[Vinod Tiwari]

Correct answer is C only.

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