create table record ( id int auto_increment primary key, a_id int null, a_sx int null, a_sy int null, b_id int null, b_sx int null, b_sy int null, a_steps varchar(1000) null, b_steps varchar(1000) null, map varchar(1000) null, map_rows int null, map_cols int null, inner_walls_count int null, loser varchar(10) null, createtime datetime null );