Erreur SQL !
SELECT * FROM flux_actu WHERE theme_src="monde" and id_flux_actu="536195$article=canada-trudeau-accuse-de-conflit-d-interet-a-deux-mois-des-elections" UNION (SELECT * FROM flux_sport WHERE theme_src="monde" and id_flux_sport="536195$article=canada-trudeau-accuse-de-conflit-d-interet-a-deux-mois-des-elections") UNION (SELECT * FROM flux_tech WHERE theme_src="monde" and id_flux_tech="536195$article=canada-trudeau-accuse-de-conflit-d-interet-a-deux-mois-des-elections") UNION (SELECT * FROM flux_foot WHERE theme_src="monde" and id_flux_foot="536195$article=canada-trudeau-accuse-de-conflit-d-interet-a-deux-mois-des-elections")