Erreur SQL !
SELECT * FROM flux_actu WHERE theme_src="mercato" and id_flux_actu="3633816$article=mercato-monaco-ben-yedder-et-batshuayi-pistes" UNION (SELECT * FROM flux_sport WHERE theme_src="mercato" and id_flux_sport="3633816$article=mercato-monaco-ben-yedder-et-batshuayi-pistes") UNION (SELECT * FROM flux_tech WHERE theme_src="mercato" and id_flux_tech="3633816$article=mercato-monaco-ben-yedder-et-batshuayi-pistes") UNION (SELECT * FROM flux_foot WHERE theme_src="mercato" and id_flux_foot="3633816$article=mercato-monaco-ben-yedder-et-batshuayi-pistes")