Help Adding An Auto Increment Column into a table

Might be phpmyadmin, mysql version problem.

[rj87uk]

Hey All,

Need a little help - I have done this several times with no problems however when I updated my computer I am now getting errors.

I have a table with values Town,Region I now wish to add in an Auto_Increment column into this table. I use id, int 11, not null, auto_increment & select Primary Key. I click save and get this error:

SQL query:
ALTER TABLE `cities` ADD `id` INT( 11 ) NOT NULL AUTO_INCREMENT FIRST
MySQL said: Documentation
#1075 - Incorrect table definition; there can be only one auto column and it must be defined as a key 

I am using: phpMyAdmin - 2.11.3 & MySQL client version: 5.0.51

It works fine on: phpMyAdmin - 2.8.0.3 & MySQL client version: 5.0.20.

Any ideas?

[yumigator]

"#1075 - Incorrect table definition; there can be only one auto column and it must be defined as a key"

That's the problem. Only one column may be auto_increment. Is there any particular reason you need two? Generally, auto_increment is just used to generate unique id's for each row.

[LifeinAsia]

Also see [webmasterworld.com...]

[rj87uk]

Thanks yumigator & LifeInAsia,

I just double checked but there is no other primary field & also says in phpmyadmin "No index defined!" I am sure there is no auto_increment.

I can do all of this in the previous version of phpmyadmin/mysql however when I updated it started giving me this error, so any help?

RJ

[rocknbil]

alter table cities add id int(11) primary key auto_increment not null;

[rj87uk]

Hi rocknbil,

You are my hero. One question I have is why did it not add that into the mysql statement even when I clicked the "primary key" checkbox in phpmyadmin?

Thanks - It works!