How to keep only one row of a table, removing duplicate rows?

Question

I have a table that has a lot of duplicates in the Name column. I\'d like to only keep one row for each.

The following lists the duplicates, but I don\'t know how to

Answer 1

If we want to see first which rows you are about to delete. Then delete them.

with MYCTE as (
    SELECT DuplicateKey1
        ,DuplicateKey2 --optional
        ,count(*) X
    FROM MyTable
    group by DuplicateKey1, DuplicateKey2
    having count(*) > 1
) 
SELECT E.*
FROM MyTable E
JOIN MYCTE cte
ON E.DuplicateKey1=cte.DuplicateKey1
    AND E.DuplicateKey2=cte.DuplicateKey2
ORDER BY E.DuplicateKey1, E.DuplicateKey2, CreatedAt

Full example at http://developer.azurewebsites.net/2014/09/better-sql-group-by-find-duplicate-data/