Apply distinct on Three column

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Apply distinct on Three column

Author

Topic

yaman
Posting Yak Master

213 Posts

Posted - 2010-03-29 : 14:58:08

Sir ,

How can i apply distinct on three column out of ten colum .
Please help me out sir ,

Yaman

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2010-03-29 : 15:59:30

You could use a GROUP BY, however we need to see some sample data to determine what query to use. You probably will need a derived table.

Tara Kizer
Microsoft MVP for Windows Server System - SQL Server
http://weblogs.sqlteam.com/tarad/

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visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2010-03-30 : 13:22:20

one way is as follows

SELECT t. required columns here....
FROM YourTable t
INNER JOIN (SELECT Col1,Col2,Col3,MIN(PK) AS First
            FROM YourTable
            GROUP BY Col1,Col2,Col3)t1
ON t1.Col1 = t.Col1
AND t1.Col2 = t.Col2
AND t1.Col3 = t.Col3
AND t1.First=t.PK

Col1,Col2,Col3 is columns for which you need distinct combination

PK is your primary key

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SQL Server MVP
http://visakhm.blogspot.com/

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