Question

MY Table is

id  position  some data   
---|--------|------------|
1  | 1      | data       | 
1  | 2      | data       | 
2  | 1      | data       | 
2  | 2      | data       | 
5  | 1      | data       | 
5  | 2      | data       |
5  | 3      | data       | 

how do i format it into the following. so that it shows only the unique ID with the highest position as following. The data is a longitude and latitude, so it should only return the highest position long and lat.

id  position  some data   
---|--------|------------|
1  | 2      | data       | 
2  | 2      | data       | 
5  | 3      | data       | 

Answer 1

You can join on a maximum-grouped set;

select *
from the_table inner join (
    select id, max(position) as max_pos
    from the_table
    group by id
    ) as T on the_table.id = T.id and the_table.position = T.max_pos
 order by the_table.id