How to remove duplicate records in a table?

Question

I\'ve got a table in a testing DB that someone apparently got a little too trigger-happy on when running INSERT scripts to set it up. The schema looks like this:

Answer 1

here is a great article on that: Deleting duplicates, which basically uses this pattern:

WITH    q AS
        (
        SELECT  d.*,
                ROW_NUMBER() OVER (PARTITION BY id ORDER BY value) AS rn
        FROM    t_duplicate d
        )
DELETE
FROM    q
WHERE   rn > 1

SELECT  *
FROM    t_duplicate