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mikehins/delete-duplicates

Last active July 21, 2022 16:03
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delete-duplicates
# https://sqlfordevs.io/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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