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Possible Error in Data Retreival?
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TOPIC: Possible Error in Data Retreival?
#31810
Possible Error in Data Retreival? 12 Years, 2 Months ago Karma: 2
Link: www.halscrib.com/index.php/web-club/results?Tournament=2012-09-11+19:00:00

SQL command:


Code:
SELECT
    IF(@LastScore9 <> Score, @CurrentRank9 := @CurrentRank9 + @NextRank9, @CurrentRank9) AS Rank, Player, Games, GamePoints, GamesWon, PointSpread, PlusPoints, Movie,
    IF(@LastScore9 = Score, @NextRank9 := @NextRank9 + 1, @NextRank9 := 1) as AddToGetNextRank9,
    @LastScore9 := Score AS Score
FROM Spreads
JOIN (SELECT @CurrentRank9 := 1, @LastScore9 := 0, @NextRank9 := 0) r
WHERE Tournament='2012-09-11 19:00:00' AND Games=9
ORDER BY Score DESC;


Look at the last line: ORDER BY Score DESC

But the data shows Score in ASC order!
JugglingReferee
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#31811
Re:Possible Error in Data Retreival? 12 Years, 2 Months ago Karma: 760
Hello,

Could you send SQL dump of "Spreads" table with sample data by email?

Regards,
ARI Soft
admin
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#31813
Re:Possible Error in Data Retreival? 12 Years, 2 Months ago Karma: 2
Done.
JugglingReferee
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#31815
Re:Possible Error in Data Retreival? 12 Years, 2 Months ago Karma: 760
Check your mail please.

Regards,
ARI Soft
admin
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#31840
Re:Possible Error in Data Retreival? 12 Years, 2 Months ago Karma: 2
I found the issue.

When my ranked-with-ties SQL query is executed by itself, the correct result is shown.

However, my query needs ranked-with-ties data from 3 subsets of the data.

I do this with the UNION statement: (query 1) UNION (query 2) UNION (query 3).

When I introduce the union statement, the ranked-with-ties system breaks down and no longer works.
JugglingReferee
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Last Edit: 2012/09/12 12:34 By JugglingReferee.
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#31932
Re:Possible Error in Data Retreival? 12 Years, 2 Months ago Karma: 2
I've decided to abandon the use of the UNION keyword. It's unreliable.

Instead, I've going to modify my exist single SELECT statement to handle different Games values.
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