text: CREATE TABLE playground_log.games (
    id int(11) NOT NULL AUTO_INCREMENT,
    winner varchar(10) NOT NULL,
    total_size int(15) NOT NULL,
    board_config varchar(2000),
    black_player varchar(20),
    white_player varchar(20),
    created_time datetime NOT NULL,
  
    PRIMARY KEY (id),
    KEY idx_winner (winner)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
  
  CREATE TABLE playground_log.game_logs (
    id int(11) NOT NULL AUTO_INCREMENT,
    game_id int(11) NOT NULL,
    idx int(15) NOT NULL,
    stone_color varchar(20),
    x_axis int(15),
    y_axis int(25),
  
    PRIMARY KEY (id),
    FOREIGN KEY (game_id) REFERENCES playground_log.games(id),
    KEY idx_game_id (game_id)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;