create table article ( id int auto_increment primary key, title varchar(120) not null, createtime datetime not null, author_id int not null, constraint article_auth_user_id_fk foreign key (author_id) references auth_user (id) ); create table content ( id int not null primary key, content text null, constraint content_article_id_fk foreign key (id) references article (id) ); CREATE DATABASE `cm_blog` /*!40100 DEFAULT CHARACTER SET utf8mb4 */