5 requêtes exécutées ou non

select session_id from sessions where session_id='iqrnues5na1doqoceko8lf9hr7' ((req.1))
insert into sessions (session_id) values ('iqrnues5na1doqoceko8lf9hr7') ((req.2))
select * from cache_url where md5_page='64066829f390b573603063a799fd0aae' and lang='fr' ((req.3))
SET SQL_BIG_SELECTS=1; ((req.4))
select concat(ville,' (',cp,')') as titre_alpha_fr, c.*, r.region as nom_region, d.departement as nom_departement, concat(r.region,'/',d.departement,'/',if(substring(ville,1,1)='A','',concat(substring(ville,1,1),'/')),ville) as url_fr, les_pages.affichage, les_pages.stats_tot as page_stats_tot, les_pages.annee as page_annee, les_pages.stats_annee as page_stats_annee, les_pages.mois as page_mois, les_pages.stats_mois as page_stats_mois, les_pages.stats_mois_prec as page_stats_mois_prec, les_pages.stats_annee_prec as page_stats_annee_prec, id_page, cached from communes c left join les_pages on contenu_id=-c.id inner join regions r on c.region=r.id inner join departement d on d.id_departement=c.departement where d.pays='fr' and r.pays='fr' and ville='aucun' and r.region='Midi-Pyrénées' and d.departement='Hautes-Pyrénées' order by ville asc ((req.5))
Erreur : select concat(ville,' (',cp,')') as titre_alpha_fr, c.*, r.region as nom_region, d.departement as nom_departement, concat(r.region,'/',d.departement,'/',if(substring(ville,1,1)='A','',concat(substring(ville,1,1),'/')),ville) as url_fr, les_pages.affichage, les_pages.stats_tot as page_stats_tot, les_pages.annee as page_annee, les_pages.stats_annee as page_stats_annee, les_pages.mois as page_mois, les_pages.stats_mois as page_stats_mois, les_pages.stats_mois_prec as page_stats_mois_prec, les_pages.stats_annee_prec as page_stats_annee_prec, id_page, cached from communes c left join les_pages on contenu_id=-c.id inner join regions r on c.region=r.id inner join departement d on d.id_departement=c.departement where d.pays='fr' and r.pays='fr' and ville='aucun' and r.region='Midi-Pyrénées' and d.departement='Hautes-Pyrénées' order by ville asc (Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '=')