Question

For example, I have a table which looks like this :

id | name

1 | Mike

2 | Adam

3 | John

4 | Sarah
…

Now, when I execute query select * from table order by id desc it will output something like this:

4 | Sarah

3 | John

2 | Adam

1 | Mike

Now what do I do if I want to move John’s row up or down, or move Adam’s row up or down ( with a MySQL query ( I need basic one, just to know from where to start )).

My solution :

First of all, I created another column named orderID which has the same value as id.

Here is an example which moves up a user:

 $query = "
 SELECT  (
    SELECT orderID 
    FROM test WHERE id = 'user id that i want to move up'
    ) AS user_order,
    (
    SELECT orderID 
    FROM test WHERE orderID > user_order 
    ORDER BY orderID 
    LIMIT 0,1
    ) AS nextUser_order
 ";
 $result = mysql_query($query);
 $data = mysql_fetch_assoc($result);
 $query = "
 UPDATE test SET orderID = IF(orderID='{$data[nextUser_order]}', 
                  '{$data[user_order]}', '{$data[nextUser_order]}')
      WHERE orderID IN ('{$data[nextUser_order]}', '{$data[user_order]}');
 ";
 $result = mysql_query($query);

Is there a better way to do that?

Answer 1

You have to switch IDs, or to order it by another column. That’s the only way.