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duplicate rows

Author

Topic

laddu
Constraint Violating Yak Guru

332 Posts

Posted - 2009-07-07 : 16:56:01

I am new to T-SQL. How to find a only duplicate rows in a table.

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2009-07-07 : 17:12:13

Using which version of SQL Server?

N 56°04'39.26"
E 12°55'05.63"

laddu
Constraint Violating Yak Guru

332 Posts

Posted - 2009-07-07 : 17:15:42

SQL Server 2005

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2009-07-07 : 17:23:49

SELECT *
FROM (
SELECT *, ROW_NUMBER() OVER (PARTITION BY Col1 ORDER BY Col2) AS recID
) AS d
WHERE recID > 1

N 56°04'39.26"
E 12°55'05.63"

laddu
Constraint Violating Yak Guru

332 Posts

Posted - 2009-07-08 : 12:34:45

Thanks Peso!

Lets say I have a table1

column1 column2

1 a
2 b
3 c
4 a
5 b
6 d

I need a query for below O/P

column1 column2

1 a
4 a
2 b
5 b

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2009-07-08 : 12:40:11

[code]SELECT column1,column2
(
SELECT COUNT(column1 ) OVER (PARTITION BY column2) AS Occurance, column1,column2
FROM YourTable
)t
WHERE Occurance>1
[/code]

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