Špatný dotaz: Unknown column 'skype' in 'where clause'
SELECT id,nazev,poradi,text,zkracene,url,id_kategorie,kod,datum,datum_zobrazovat FROM prispevek WHERE zobrazovat="A" AND (id_kategorie in(skype-meeting-erasmus ) or exists(select * from prispevek_kategorie pk where pk.id_prispevek = prispevek.id and pk.id_kategorie in (skype-meeting-erasmus ))) order by datum DESC ,id DESC