How many rows are returned from the query below?

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How many rows are returned from the query below?

Ashka Modi

Old Hand

Points: 377
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March 2, 2010 at 8:54 pm

#217351

Comments posted to this topic are about the item How many rows are returned from the query below?
Thanks,
Ashka Modi
Software Engineer || credEcard Technologies (india) Pvt. Ltd.

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Joy Smith San SSC-Insane Points: 24877 More actions · Answer 1

I got an error when I tried in SQL Server 2005...!!!

mandarkavishwar SSC Veteran Points: 243 More actions · Answer 2

That query gives perfect result.

Thanks.

Mandar Kavishwar.

EC Infosolution

Joe SQL SSChasing Mays Points: 620 More actions · Answer 3

Seems to be a lot missing assumptions. Each given answer can be correct given different starting conditions.

Running the code as-is got me an error first (tblUsers does not exist. doh!).

I then created the table and got 0 rows as the result.

I added 1 row and got 1 row as the result.

Added another row and got 2 rows as the result.

Adding more rows kept the result at 2 rows.

honza.mf SSCertifiable Points: 5519 More actions · Answer 4

WTF is tblUsers?

It can be a table or a view or nothing.

If it is anything defined (table or view) it can be empty (0 rows returned), it can contain just 1 row (1 row returned) or it can contain more rows (2 rows returned).

With these assumptions - three answers possible - tblUsers is undefined and the script returns an error message. QED

See, understand, learn, try, use efficient
© Dr.Plch

ziangij SSCrazy Eights Points: 8066 More actions · Answer 5

i fail to understand what is the learning in this question. anybody plz. suggest...

ziangij SSCrazy Eights Points: 8066 More actions · Answer 6

if the query contains a top 3

SELECT top 3 c.*, Users.* FROM reptec_changedim c, Users

then this will return 3 records...

simon.whale Ten Centuries Points: 1393 More actions · Answer 7

I get an error saying tblUsers doesn't exist.. Is this a Version issue or missing information? im on SQL 2005

nigel. SSChampion Points: 11636 More actions · Answer 8

Aam-624390 (3/3/2010)
Seems to be a lot missing assumptions. Each given answer can be correct given different starting conditions.

Agreed, question is incomplete and I fail to see the point of it.

Nigel
How to post questions

nigel. SSChampion Points: 11636 More actions · Answer 9

ziangij (3/3/2010)
i fail to understand what is the learning in this question. anybody plz. suggest...

No idea!!!! :w00t:

Nigel
How to post questions

Toreador SSChampion Points: 11368 More actions · Answer 10

Aam-624390 (3/3/2010)
Seems to be a lot missing assumptions.

Well it seems a reasonable assumption that tblUsers exists, and is a table.

You then have to guess about data volumes - I thought that since a system generally has more than one user it was reasonable to assume that there were at least 2 rows.

Having made those assumptions then there could only be one answer - but I'm not sure what the question was meant to demonstrate? Did those who got it wrong just make different assumptions?

Open Minded SSCommitted Points: 1872 More actions · Answer 11

I think this was about cross join?

I use these kind of statements to generate the possible valid sales of products against a table of customers. The generated table/view becomes the 'pigeonhole' to hold incoming, actual sales.

honza.mf SSCertifiable Points: 5519 More actions · Answer 12

Toreador (3/3/2010)
Aam-624390 (3/3/2010)
Seems to be a lot missing assumptions.
Well it seems a reasonable assumption that tblUsers exists, and is a table.
You then have to guess about data volumes - I thought that since a system generally has more than one user it was reasonable to assume that there were at least 2 rows.
Having made those assumptions then there could only be one answer - but I'm not sure what the question was meant to demonstrate? Did those who got it wrong just make different assumptions?

Assumptions above are reasonable but not absolute. "tblAnything" can be a view. System may have many users but under some conditions the table will be empty.

Author is not able to fix conditions by using either temporary table or some system table (view).

I think that nobody will argument that there is no sysdatabases and it can be empty. Maybe some Oracle or HisSQL user 😛

Chris Houghton SSCrazy Points: 2557 More actions · Answer 13

A poorly conceived question. I'm not entirely sure of the authors intention.

Adi Cohn-120898 SSC-Dedicated Points: 33944 More actions · Answer 14

I agree with the posters that claim that the question had more then 1 answer that could be correct. I guessed the answer because I assumed that the table exists and that it has more then 1 record. The fact that we need to make any assumptions means that the question should be re written. Especially when all the given answers could be correct with different assumptions.

Adi

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