how to delete duplicate rows of non unique rows in SQL ?

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hi all

how to delete duplicate rows of non unique rows in SQL ?

I have 3 duplicate rows which are non - unique rows

this is my table in SQL

Name
````
xyz
xyz
xyz`````Need to delete only first 2 rows ,Leave third row. xyz

Thanks in advance

Naveen...

Posted 7-Jul-10 19:31pm

nav234

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Goutam Patra 8-Jul-10 1:59am

Is all columns have identical values? If so then you cant.

2 solutions

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Sandeep Mewara · Answer 1 · 2010-07-07T20:07:00

Solution 1

It will be a little complicated to make it full querywise, have a look at detailed way here:
MSDN: How to remove duplicate rows from a table in SQL Server[^]

Posted 7-Jul-10 20:07pm

Sandeep Mewara

Helen.Yu · Answer 2 · 2010-07-07T20:27:00

Solution 2

hi, Naveen
If you use sqlserver2005,you can try it.

<pre lang="sql">WITH [CTE DUPLICATE] as
(SELECT RN=ROW_NUMBER() OVER (ORDER BY name)
FROM test
)
delete from [CTE DUPLICATE] where RN<3

Posted 7-Jul-10 20:27pm

Helen.Yu