CREATE TABLE users_content_data (
 content_id int(3) PRIMARY KEY auto_increment,
 page_content mediumtext,
 FOREIGN KEY (content_id) REFERENCES users_page_content (content_id) ON DELETE CASCADE
)TYPE=INNODB;

CREATE TABLE users_page_content (
  page_content_id  int(11) PRIMARY KEY auto_increment,
  page_id int(11) NOT NULL,
  content_id int(3) NOT NULL,
  KEY (page_id),
  KEY (content_id),
  FOREIGN KEY (page_id) REFERENCES users_site_structure ( menu_id)
)TYPE=INNODB;