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mikehins/Delete Duplicate Rows

Last active March 27, 2023 11:41
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Delete Duplicate Rows
# https://sqlfordevs.com/delete-duplicate-rows
WITH duplicates AS (
SELECT id, ROW_NUMBER() OVER
(
PARTITION BY firstname, lastname, email
ORDER BY age DESC
) AS rownum
FROM contacts
)
DELETE contacts
FROM
contacts
JOIN duplicates USING ( id )
WHERE
duplicates‍.‍ rownum > 1
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