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2026-05-15 10:37:48 +02:00

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Trouver les doublons

Trouver des doublons en SQL

SELECT COUNT(*) AS nbr_doublon, champ1, champ2, champ3 FROM table GROUP BY champ1, champ2, champ3 HAVING COUNT(*) > 1 SELECT DISTINCT * FROM table t1 WHERE EXISTS ( SELECT * FROM table t2 WHERE t1.ID <> t2.ID AND t1.champ1 = t2.champ1 AND t1.champ2 = t2.champ2 AND t1.champ3 = t2.champ3 )