Calculate distance between two points directly in SQLite

Question

In my web/MySQL application I have something like this to get distance between two points:

6371 * acos(cos(radians(-19.83996)) * cos(radians(lat)) * cos(radi         


        

Answer 1

Reply of Angel does not solve the problem for SQLite since it still includes ACOS function which does not exist in SQLite

What I have concluded after a thorough research is that one should pick a rough estimation to use in SQLite with the formula below:

Distance estimation for km:

SQRT(SQUARE((TO_LAT-FROM_LAT)*110)+
     SQUARE((TO_LONG-FROM_LONG)*COS(TO_LAT)*111))