Updating display order of multiple MySQL rows in one or very few queries

Question

I have a table with say 20 rows each with a number for display order (1-20).

SELECT * FROM `mytable` ORDER BY `display_order` DESC;

From an adm

Answer 1

Add an id (or other key) to the table, and update where id (or key) = id (or key) of changed row.

Of course, you'll have to make sure that either there are no duplicate display_order values, or that you're OK with ties in display_order displaying in any order, or you'll introduce a second, tie-breaker to the order by list.