text: ALTER TABLE tournaments ADD team_size TINYINT NOT NULL;
  
  CREATE TABLE teams(
  	id BIGINT NOT NULL,
  	name VARCHAR(25) NOT NULL,
  	tournament BIGINT NOT NULL,
  	captain INT NOT NULL,
  	PRIMARY KEY (id),
  	UNIQUE (name),
  	FOREIGN KEY (tournament) REFERENCES tournaments(id)
  		ON UPDATE CASCADE
  		ON DELETE CASCADE
  );
  
  CREATE TABLE team_users(
  	team BIGINT NOT NULL,
  	attributes TINYINT NOT NULL,
  	user INT NOT NULL,
  	PRIMARY KEY(team, user),
  	FOREIGN KEY(team) REFERENCES teams(id)
  		ON DELETE CASCADE
  		ON UPDATE CASCADE
  );
  