-- 查询所有书籍信息 SELECT `content_id` AS '书籍ID', `title` AS '书名', `author` AS '作者', `cover_url` AS '当前封面URL', `content_type` AS '类型(1=电子书,2=听书)', `status` AS '状态(1=连载,2=完结)' FROM `content` ORDER BY `content_id`;