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))) <= 10
ORDER BY entfernung