How to take a number which compare nearby some numbers ?

[Lost User]

Better yet, this query works too:

SELECT * FROM news1 ORDER BY ABS(news_id-10)

[Luc Pattyn]

of course it does, however using squares is a common technique to optimize a "cost function", say when you need to find a best match for several parameters, you do:

"... ORDERBY (var1-goal1)*(var1-goal1)+(var2-goal2)*(var2-goal2)...+(varN-goalN)*(varN-goalN)"

:)

Luc Pattyn [Forum Guidelines] [My Articles]

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I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

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[Lost User]

Here is a better answer:

DECLARE @i int

SET @i = 30

SELECT TOP 1 Col1 FROM Table1 ORDER BY ABS(Col1-@i)

[Niladri_Biswas]

Hi, Just 1 question to ask? If the input is 39 what be the output? Is it 43 or 35 or both? If the answer is the last one, then how

Shameel wrote:

TOP 1 Col1

will help? :)

Niladri Biswas

[Golden Jing]

thanks you so much Niladri Diswas....

VB.Net

[Golden Jing]

Dear All Thanks for you help. Now i can get that task ready. Best regards,

VB.Net

[Lost User]

If you remove the 'TOP 1' clause, you will see that the query returns both values. Adding TOP clause arbitrarily returns the first match.

[Roger Wright]

I believe the above will order the items by the value of news_id-10, not by their distance from the target value of 30. To do that, you would have to change the ORDER BY clause to ((news_id-10 * new_id-10) - (target_value * target_value)). It might be easier still to use ABS(ABS(news_id-10) - ABS(target_value)) though using the function ABS() may slow execution somewhat. I've been trying to figure out a way to use MIN(ABS(news_id-10) - ABS(target_value)) in a way that will return a record instead of a single value, but I lack the knowledge for that (for now). That would give him the desired information in one step.

"A Journey of a Thousand Rest Stops Begins with a Single Movement"

[Luc Pattyn]

Hi Roger, I don't know what you are trying with all those ABS functions, they don't make sense to me. My point is: to order items according to their distance from a target or goal, you either use a single ABS (useful only for one criterium, one goal), or a least-square approach (where you calculate a formula involving squaring deviations as I indicated before). My example with news_id (and target 10) wasn't an exact match for the OP, it was the code that I tested for something of mine. :)

Luc Pattyn [Forum Guidelines] [My Articles]

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I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

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[Roger Wright]

I thought the ABS function might be a shortcut, in that it accomplishes the same thing as squaring when you want only the distance between two values, regardless of which is smaller. My main consideration was that the example you gave did not return a distance from the target of 30, only reorders the table. Now that I reread your response, I see that the value I was reading as a single variable (news_id-10) is actually (new_id - 10). That's what I get for reading this stuff late at night after a long day at work, wiring sewer plant pump motors in a frigid dust storm. My bad. :-O

"A Journey of a Thousand Rest Stops Begins with a Single Movement"

[Luc Pattyn]

NP :)

Luc Pattyn [Forum Guidelines] [My Articles]

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I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

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