SELECT id, ort, fachwort, (
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.20195357665669) * (sin(RADIANS(lat)) *
sin(0.84017738145981) + cos(RADIANS(lat)) *
cos(0.84017738145981)) - sin(RADIANS(lng)) * sin(0.20195357665669)))) AS entfernung
FROM literatur WHERE
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.20195357665669) * (sin(RADIANS(lat)) *
sin(0.84017738145981) + cos(RADIANS(lat)) *
cos(0.84017738145981)) - sin(RADIANS(lng)) * sin(0.20195357665669))) <= 10
ORDER BY entfernung