Query: 	SELECT banner_link, ad_link FROM banner
					LEFT JOIN  ads ON banner.banner_kunde = ads.ad_kunde 
					WHERE banner_link  =:get_url
					LIMIT 1
														
					UNION
							
					SELECT banner_link, ad_link FROM banner
					RIGHT JOIN ads ON banner.banner_kunde = ads.ad_kunde 
					WHERE ad_link =:get_url
					LIMIT 1
					
SQLSTATE[HY000]: General error: 1221 Incorrect usage of UNION and LIMIT