相关疑难解决方法(0)

首先..这里是我创建的两个表(没有相关的列)...

CREATE TABLE users_history1 (
  circuit tinyint(1) unsigned NOT NULL default '0',
  userh_season smallint(4) unsigned NOT NULL default '0',
  userh_userid int(11) unsigned NOT NULL default '0',
  userh_rank varchar(2) NOT NULL default 'D',
  userh_wins int(11) NOT NULL default '0',
  userh_losses int(11) NOT NULL default '0',
  userh_points int(11) NOT NULL default '1000',
  KEY (circuit, userh_userid),
  KEY (userh_season)
) ENGINE=MyISAM;

CREATE TABLE users_ladders1 (
  circuit tinyint(1) unsigned NOT NULL default '0',
  userl_userid int(11) unsigned NOT NULL default '0',
  userl_rank char(2) NOT NULL default …