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SQL Select Query Issue

Posted on 2013-01-23
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Last Modified: 2013-01-23
Hi

I have a SQL query that brings up two lines for the same invoice
How would I do a further Select on this that only shows the first date

Supplier      Ref      Total      Due      Date
boston breweries      28924      4 990.34      4 990.34      2012/12/30
boston breweries      28924      4 990.34      4 990.34      2013/01/17
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Question by:murbro
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3 Comments
 
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Accepted Solution

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Guy Hengel [angelIII / a3] earned 500 total points
ID: 38809353
please read up this article:
http://www.experts-exchange.com/Database/Miscellaneous/A_3203-DISTINCT-vs-GROUP-BY-and-why-does-it-not-work-for-my-query.html

it will explain that you just have to clarify the rule on which row you want to show up (in your case, which "date" to choose), and formulate the sql accordingly
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LVL 18

Expert Comment

by:deighton
ID: 38809472
SELECT * FROM (SELECT DQ.*, row_number() OVER(PARTITION BY DQ.supplier,    DQ.Ref,   DQ.Total,   DQ.Due ORDER BY DQ.date)  AS ROWN
FROM (<your exisitng query here>) DQ) DQ2
WHERE DQ2.ROWN=1
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Author Closing Comment

by:murbro
ID: 38810084
thanks very much
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