ERR Chybný dotaz do DB v PDO
SELECT cm.id, obec, loc_x, loc_y, panstvi, historie,
znak, zkratka, nazev_okresu, kraj, cm.kraj_id,
cm.okres_id
FROM cis_mista AS cm, cis_okresy AS co, cis_kraje AS ck
WHERE cm.id = ? AND cm.okres_id = co.okres
AND loc_x AND ck.id = co.kraj_id