SELECT a.*, b.*, a.opiss, a.id as id, count(z.id) as komentarzy, round(AVG(oceny.ocena), 1) as ocena FROM programy a, kategorie b LEFT JOIN komentarze z ON (z.typ='programy' AND z.item_id=a.id) LEFT JOIN oceny ON (oceny.item_id=a.id AND oceny.typ='programy') WHERE a.stat='1' AND b.id='156' AND a.path = b.path  GROUP by a.id ORDER by a.tytul ASC limit 0,10Error: Nieznana kolumna 'a.id' w  on clause<br/>