Erreur SQL ! <br>SELECT id,`num_facture`, `date_commande`, `date_validation`, `libelle`, `ref`, `entite_facturation`, `num_mois`, `num_annee`, `taux_tva`, `tva_intra`, `etat_paiement`, `mode_paiement` , sum(`montant_ht`) AS montant_ht_total, sum(`reduction_montant`) AS reduction_montant_total, msg_validation, montant_credit FROM `commande` WHERE `client_id` =''%20+%20client%20+%20'' AND ref = ''%20+%20value%20+%20'' AND etat_paiement=1 GROUP BY `ref`<br>