create table userinfo( user_nid int auto_increment primary key not null, user_name char(16) not null, user_pwd varchar(64) not null, user_email varchar(32) not null, user_phone char(11) not null, user_head varchar(64) not null, unique uni_user_name (user_name) )
原文：http://www.cnblogs.com/cloniu/p/6431263.html
