mysql custom sort

Question

hello,

I have a query like this: SELECT * FROM table WHERE id IN (2,4,1,5,3);

However, when I print it out, it's automatically sorted 1,2,3,4,5. How can we maintain the order (2,4,1,5,3) without changing the database structure?

Thanks!

Answer 1

i ask this :

http://stackoverflow.com/questions/2005350/mysql-order-by-issue

the answers that i get and all the credit belong to them is :

You can use a CASE operator to specify the order:

SELECT * FROM table
WHERE id IN (3,6,1,8,9)
ORDER BY CASE id WHEN 3 THEN 1
                 WHEN 6 THEN 2
                 WHEN 1 THEN 3
                 WHEN 8 THEN 4
                 WHEN 9 THEN 5
         END

in php u can do it like :

<?php

$my_array =  array (3,6,1,8,9) ;

$sql = 'SELECT * FROM table  WHERE id IN (3,6,1,8,9)';

$sql .= "\nORDER BY CASE id\n";
foreach($my_array as $k => $v){
    $sql .= 'WHEN ' . $v . ' THEN ' . $k . "\n";
}
$sql .= 'END ';

echo $sql;

?>