Question

Alright, so I’m getting the error:

#1062 - Duplicate entry '0' for key 'PRIMARY'

on this table:

CREATE TABLE links (
        ID smallint(6) NOT NULL default '0',
        Position smallint(6) NOT NULL default '0',
        Name text NOT NULL,
        url text NOT NULL,
        IP text NOT NULL,
        PRIMARY KEY (ID)
        ) TYPE=MyISAM; 

using this command:

INSERT INTO links(Position, Name, url, IP) VALUES(0, "Google", "http://www.google.com", "0.0.0.0")

The table is only has one row in it, so why the heck isn’t the auto increment working? :<

Answer 1

You’re not actually defining the ID column as an auto-increment column. Also, a DEFAULT value doesn’t make sense for an auto incrementing column either.

Your id column should be:

ID smallint(6) NOT NULL AUTO_INCREMENT

More info here: http://dev.mysql.com/doc/refman/5.0/en/example-auto-increment.html