SELECT id, ort, fachwort, ( 6368 * SQRT(2*(1-cos(RADIANS(lng)) * cos(0) * (sin(RADIANS(lat)) * sin(0) + cos(RADIANS(lat)) * cos(0)) - sin(RADIANS(lng)) * sin(0)))) AS entfernung FROM literatur WHERE 6368 * SQRT(2*(1-cos(RADIANS(lng)) * cos(0) * (sin(RADIANS(lat)) * sin(0) + cos(RADIANS(lat)) * cos(0)) - sin(RADIANS(lng)) * sin(0))) <= 25 ORDER BY entfernung