Error: mysqli_query()
select acco_clave as clave, CON_NOMBRE as nombre, ACCO_TITULO as titulo, ACCO_ANNO as anno, ACCO_LUGAR_CELEBRACION as lugar, ACCO_LINK as link, CON_ACRONIMO as acronimo, ACCO_LINK_VIDEO as link_video, ACCO_LINK_SLIDES as link_slides from actividad_congreso, congreso where ACCO_CONGRESO = CON_ACRONIMO and acco_tipo_actividad = 'Keynote' and ACCO_PERSONA like 'Xavier Ferré' order by ACCO_ANNO desc