SELECT id, ort, fachwort, (
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.19931774725907) * (sin(RADIANS(lat)) *
sin(0.83888081650107) + cos(RADIANS(lat)) *
cos(0.83888081650107)) - sin(RADIANS(lng)) * sin(0.19931774725907)))) AS entfernung
FROM literatur WHERE
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.19931774725907) * (sin(RADIANS(lat)) *
sin(0.83888081650107) + cos(RADIANS(lat)) *
cos(0.83888081650107)) - sin(RADIANS(lng)) * sin(0.19931774725907))) <= 10
ORDER BY entfernung