I need that this query return only one value

Question

Hi, please. I need your help. I have this query:
SELECT c.charvalue "Comentario", max(pi.id) as "id" --into :gcpe_last_comment
FROM twflprocessinstances pi, twfliprocessparameters c
WHERE pi.id = c.iprocess_id
AND c.param_id = 1002286
AND c.charvalue IS NOT NULL
AND pi.processdef_id = 1600
AND to_number(pi.id) <> 3817940
AND to_number(pi.seeparameter1) =80137377
group by c.charvalue
having max(pi.id)
This query return 3 rows, but I need that this query return only one row. The row that this query should return is the row before at the max id. Thanks

Answer 1

Mmmm...I don't get it.
You might need to post some sample data and expected results.