Re-Indexing MySQL INT Primary Keys & Reset AUTO_INCREMENT

Question

So I have a MySQL database that I\'m using with a PHP site. Over the course of weeks of development, I\'m left with something like:

Table: users

id  | name         


        

Answer 1

Why do you need to change the order of the names in the database? You can just add an ORDER BY name clause on your sql query to get the results in alphabetical order by name.

Answer 2

remove index on id

do something like this:

SET @rank:=0;
update users
set id=@rank:=@rank+1
order by id;

add index on id