Question

I have a table called create with only one column called name of type varchar(16).

Now I want to delete all the duplicate names and leave only one of those.

Example:

 name1
 name2
 name3
 name3
 name3
 name4

After is will be

 name1
 name2
 name3
 name4

Please advice.

I was looking around for a query but most of the available query had something to do with an index.

Answer 1

use row_number

 WITH    cte
 AS 
 ( SELECT name, row_number() OVER ( PARTITION BY name ORDER BY name ) AS row_num
    FROM     yourTable
 )
DELETE  FROM cte
WHERE   row_num > 1