I have the following table, from which i have to fetch non unique rows

Question

Asked: May 18, 20262026-05-18T23:57:35+00:00 2026-05-18T23:57:35+00:00

I’d like fetch all the rows for the column infos, that have a same idA value in at least two rows.

Output of the query for the above table must be

infos
1899
1959

I’ve tried the following requests with no success :

SELECT idA FROM XXX WHERE NOT EXISTS(SELECT * FROM XXX GROUP BY idA)
SELECT * FROM XXX a WHERE NOT EXISTS(SELECT * FROM XXX b WHERE a.RVT_ID=b.RVT_ID GROUP BY idA)

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Editorial Team · Answer 1 · 2026-05-18T23:57:35+00:00

Editorial Team

Try this:

SELECT T1.idA, T1.infos
FROM XXX T1
JOIN
(
    SELECT idA
    FROM XXX
    GROUP BY idA
    HAVING COUNT(*) >= 2
) T2
ON T1.idA = T2.idA

The result for the data you posted:

idaA  infos
201   1899
201   1959

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