SELECT id, ort, fachwort, (
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.19650068461726) * (sin(RADIANS(lat)) *
sin(0.84453445631107) + cos(RADIANS(lat)) *
cos(0.84453445631107)) - sin(RADIANS(lng)) * sin(0.19650068461726)))) AS entfernung
FROM literatur WHERE
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.19650068461726) * (sin(RADIANS(lat)) *
sin(0.84453445631107) + cos(RADIANS(lat)) *
cos(0.84453445631107)) - sin(RADIANS(lng)) * sin(0.19650068461726))) <= 10
ORDER BY entfernung