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Posted Saturday, June 28, 2008 1:34 PM

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Comments posted to this topic are about the item ALL

Post #525535

RBarryYoung

Posted Saturday, June 28, 2008 7:14 PM

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Uh, steve, this "ALL" query is the same as the "ANY" query last week, but it now reports a different answer. NOTE that the word "ALL" does not appear anywhere in the question, a typo maybe?

-- RBarryYoung, (302)375-0451 blog: MovingSQL.com, Twitter: @RBarryYoung
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Post #525560

Steve Jones - SSC Editor

Posted Sunday, June 29, 2008 10:31 AM

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Thanks, must have cut and pasted the wrong query in there.

Corrected to be all.

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Post #525629

RBarryYoung

Posted Sunday, June 29, 2008 10:50 AM

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Heh, don't suppose I'm getting my two points, eh?

Never mind, I'll take them from these replies. Besides, I wouldn't want any more "enlightened" posters accusing me of point-mongering.

-- RBarryYoung, (302)375-0451 blog: MovingSQL.com, Twitter: @RBarryYoung
Proactive Performance Solutions, Inc. "Performance is our middle name."

Post #525636

Hugo Kornelis

Posted Monday, June 30, 2008 1:41 AM

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Nice question, Steve.

Too bad you didn't use the same case in the query and the list of values, as this might (*) result in different answers being returned when tested in a database with case-sensitive or binary collation.

(*) "might", as I didn't bother to check if it reallly would. :)

Hugo Kornelis, SQL Server MVP
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Post #525758

pollockk

Posted Monday, June 30, 2008 2:59 AM

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Depends on whether the collation is case-sensitive or not. If it is the answer is 1...

--case sensitive
create table TimeGROUP(column1 varchar(255) COLLATE SQL_Latin1_General_Cp1_Cs_AS)

Insert into TimeGROUP (column1) values('value1')
Insert into TimeGROUP (column1) values('value2')
Insert into TimeGROUP (column1) values('value3')
Insert into TimeGROUP (column1) values('value4')

if 'Value1' < all ( select column1 from TimeGROUP ) select 1 else select 0

drop table TimeGROUP

--case insensitive
create table TimeGROUP(column1 varchar(255) COLLATE SQL_Latin1_General_Cp1_CI_AS)

Insert into TimeGROUP (column1) values('value1')
Insert into TimeGROUP (column1) values('value2')
Insert into TimeGROUP (column1) values('value3')
Insert into TimeGROUP (column1) values('value4')

if 'Value1' < all ( select column1 from TimeGROUP ) select 1 else select 0

drop table TimeGROUP

Post #525772

thierry.vandurme

Posted Monday, June 30, 2008 4:21 AM

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aggree with the collation thingie
also, the question mentions all lowercase strings while in the answer you mention VALUE1, which is all uppercase...
confusing, that's what I think...

Post #525787

brewmanz

Posted Monday, June 30, 2008 5:11 AM

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pollockk (6/30/2008)

Depends on whether the collation is case-sensitive or not. If it is the answer is 1...

That's what I thought too, But the Q poser knew that, and knew that I knew that, and I knew that they knew that ... giving an answer alternating between 0 and 1 depending on when you stop.
*BUT*
The poser, by not giving an option of "it depends", or "Invalid object name 'TimeGROUP'" gives the game away .. because ..
** HERE BE SPOILERS **
The table is called 'TimeGroup' but the query is 'TimeGROUP'
If the DB was case-sensitive, then the query would NOT find the table, unless there was ANOTHER table TimeGROUP - and the result of the query was *indeterminate* - not an option - so ...
The DB must be Case-Insensitive !!
QED - kind of

Post #525803

Hugo Kornelis

Posted Monday, June 30, 2008 5:21 AM

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brewmanz (6/30/2008)

The table is called 'TimeGroup' but the query is 'TimeGROUP'
If the DB was case-sensitive, then the query would NOT find the table, unless there was ANOTHER table TimeGROUP - and the result of the query was *indeterminate* - not an option - so ...
The DB must be Case-Insensitive !!
QED - kind of

<nitpicking>
Except that it is perfectly possible to define a table with a case sensitive collation in a database with a case insensitive default collation...
</nitpicking>

However, I had no doubt whatsoever after reading the question that it was written without case sensitive collations in mind. The title of the question was "ALL", so it was clear that the author wanted to test understanding of this keyword, not ability to test some code by running it and then complaining if collations didn't match. I dare to state that anyone who really knows and understands the "ANY" keyword, should be able to answer this question correctly.

(Edit - fixed the fake HTML tags)

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Post #525807

pollockk

Posted Monday, June 30, 2008 5:32 AM

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Of course these questions aren't about just running the SQL Smile

The question's main intent is clear, it's a pretty simple question about ALL - and I am not at all trying to be nitpicky or garner extra points or anything - it was just that in trying to work it out *in my head *, I noticed the case, noticed that it could affect the comparison, noticed that there wasn't enough info to deduce the whether the comparison would be case-sensitive or not - and thought that that might be an interesting *addendum/comment* to the main point.

Maybe that's just because I have been caught by tables with case sensitive collations in real life.

Kirsty

EDIT: typo + reword for clarity of intent.

Post #525810

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