MySQL sort after argument in IN()

Question

I have string containing a lot of IDs corresponding to my database. Like:

1,2,3,4,5

I then do a mySQL query to select all those rows:

Answer 1

You might use order by with case ... end, though part between case and end should be generated by PHP:

select
    *    
from
    table
where
    id in (2, 1, 3, 4, 5)
order by
    case id
        when 2 then 1
        when 1 then 2
        when 3 then 3
        when 4 then 4
        when 5 then 5
    end asc