消息MySQL Query Error
SQLSELECT a.article_id, a.title, a.description, ac.cat_name, a.thumb, a.add_time, a.file_url, a.open_type, ac.cat_id, ac.cat_name FROM `sjzainuo_com`.`ecs_article` AS a, `sjzainuo_com`.`ecs_article_cat` AS ac WHERE a.is_open = 1 AND a.cat_id = ac.cat_id AND a.cat_id = 13 AND ac.cat_type = 1 ORDER BY a.article_type DESC, a.add_time DESC LIMIT 8
错误Unknown column 'a.thumb' in 'field list'
代码1054