text: 
  create table myfleet_ranking(
          id bigint not null primary key auto_increment,
          ranking_id int not null,
          rank int not null,
          yyyymmddhh int not null,
          target_id bigint not null, -- member_idまたはship_id
          target_name tinytext not null,
          `data` text not null,      -- JSON形式
          url text,
          num bigint not null,
          created bigint not null,
          key(yyyymmddhh)
  ) engine = ARIA, default charset=utf8mb4;
  