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Mpdreamz/dedup.sql

Created June 28, 2012 07:55
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Dedup CTE awesomeness
Raw
dedup.sql
WITH CTE (Colum1, Colum2, DuplicateCount)
AS
(
SELECT Colum1, Colum2, ROW_NUMBER()
OVER(PARTITION BY Colum1, Colum2 ORDER BY Colum1) AS DuplicateCount
FROM MyTable
WHERE Colum1 = 1 AND Colum2 IS NOT NULL
)
SELECT * FROM CTE
WHERE DuplicateCount > 1
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