A Database Error Occurred

Error Number: 1054

Unknown column 'newsdetail.php' in 'on clause'

SELECT * FROM (`va_articles`) JOIN `va_articles_assigned` ON `va_articles`.`article_id` = `va_articles_assigned`.`article_id` AND va_articles_assigned.category_id = newsdetail.php WHERE `va_articles`.`status_id` = 1 ORDER BY `va_articles`.`article_date` DESC LIMIT 4