5 requêtes exécutées ou non

select session_id from sessions where session_id='8f0tdiqc3gehqigm43rct304e4' ((req.1))
insert into sessions (session_id) values ('8f0tdiqc3gehqigm43rct304e4') ((req.2))
select * from cache_url where md5_page='3394c4109813029f431b8fae5afda0d8' 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='Ambleville' and r.region='Île-de-France' and d.departement='Val-D_Oise' 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='Ambleville' and r.region='Île-de-France' and d.departement='Val-D_Oise' order by ville asc (Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '=')