It is not possible to have more than one PRIMARY
key per table.
Maybe you need to use one PRIMARY key as the main index into
the table, then use UNIQUE or KEY which is a synonym for
INDEX on the other two columns.
This book will help you ALOT with designing tables.
It will also teach you how to normalise (refactor) your
tables into a more efficient form.
It is also more efficient IMHO to index on integer values if
you can, rather than character text.
> create table members (
> logon_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT,
> email_addr varchar(30), ???
> last_name varchar(30), ???
> member_type char(1),
> email_verified char(1),
> logon_pw varchar(15),
> date_added date,
> last_login timestamp,
> first_name varchar(30),
> addr1 varchar(30),
> addr2 varchar(30),
> city varchar(20),
> state varchar(20),
> zip varchar(15),
> phone_home varchar(15),
> phone_office varchar(15),
> phone_cell varchar(15),
> mothers_maiden_name varchar(30),
> ip_of_useratsignup varchar(16),
> primary key(login_id, email_addr, last_name)
primary key login_id (login_id),
key email_addr (email_addr),
key last_name (last_name)