text: SET sql_mode = '';
  
  create table users (
  id int not null auto_increment primary key unique ,
  name varchar(191) not null ,
  email varchar(255) not null unique ,
  password varchar(191) ,
  created_at timestamp ,
  updated_at timestamp
  );
  
  create table boards (
  id integer not null auto_increment primary key unique ,
  title varchar(191) not null,
  ordering integer not null,
  user_id integer not null,
  foreign key (user_id) references users(id) on delete cascade ,
  created_at timestamp,
  updated_at timestamp
  );
  
  create table lists (
  id integer not null auto_increment primary key unique ,
  title varchar(191) not null,
  ordering integer not null,
  board_id integer not null ,
  foreign key (board_id) references boards(id) on delete cascade,
  created_at timestamp,
  updated_at timestamp
  );
  
  create table cards (
  id integer not null auto_increment primary key unique ,
  description text not null,
  ordering integer not null,
  list_id integer not null ,
  foreign key (list_id) references lists(id) on delete cascade,
  created_at timestamp,
  updated_at timestamp
  );
  
  create table activity (
  id integer not null auto_increment primary key unique ,
  text text not null,
  ordering integer not null,
  card_id integer not null ,
  foreign key (card_id) references cards(id) on delete cascade,
  created_at timestamp,
  updated_at timestamp
  );
  