-- 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`;






