Very useful answer, thanks Minty.
Here is the bottle-neck step:
str_SQL_finale = "INSERT INTO DSP_RDV_PREPA_t_transi_ChoixPraticiensAppels_OuiNon (ID_Contact, Integrer_ListeAppels, Nom_contact, Prenom_contact, Date_dernier_rdv, Nom_structure, Fonction, Specialite, Profession...