SELECT id, ort, fachwort, (
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.20187458829073) * (sin(RADIANS(lat)) *
sin(0.84028409961692) + cos(RADIANS(lat)) *
cos(0.84028409961692)) - sin(RADIANS(lng)) * sin(0.20187458829073)))) AS entfernung
FROM literatur WHERE
6368 * SQRT(2*(1-cos(RADIANS(lng)) *
cos(0.20187458829073) * (sin(RADIANS(lat)) *
sin(0.84028409961692) + cos(RADIANS(lat)) *
cos(0.84028409961692)) - sin(RADIANS(lng)) * sin(0.20187458829073))) <= 10
ORDER BY entfernung