[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fPDVD4gMiHJXPYTOHf3ALg6bfoOtRiZh3rn3ECOa-tq0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":17,"type":18},[],"2025-12-18 22:36:21",272717630,[],{"courseId":9,"courseImg":10,"courseName":11},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","设计一个图书信息数据小管家,学校图书馆需要把馆内图书信息录入电脑,并支持 日常查询与维护.请你用纯 SQLite + 基础 SQL 完成下列要求: 1)创建数据库文件 library.db,并在其中建立表 books,包含字段:id(主键自增)、 title(书名)、author(作者)、publisher(出版社)、price(定价). 2)向表中插入 5 条图书记录(内容自拟). 3)依次完成以下 5 类常用 SQL 操作: • 查询全部图书信息; • 按价格升序排列并显示; • 将指定书名的价格改为新值; 删除指定作者的全部记录; • 统计定价高于 50 元的图书数量及书名. 4)用事务(BEGIN \u002F COMMIT \u002F ROLLBACK)演示一次"给所有图书统一涨价 5 元 "操作,确保出错时可自动回滚. 请完成下面的代码填空: -- 1. 创建数据库文件 library.db 并建立表 books __________(1)___________ ( id INTEGER PRIMARY KEY AUTOINCREMENT, title TEXT NOT NULL, author TEXT NOT NULL, publisher TEXT NOT NULL, price REAL NOT NULL ); -- 2. 插入 5 条图书记录 __________(2)___________VALUES ('Python编程从入门到实践', 'Eric Matthes', '人民邮电出版社', 69.0), ('流畅的Python', 'Luciano Ramalho', '人民邮电出版社', 99.0), ('算法导论', 'Thomas H. Cormen', '机械工业出版社', 89.0), ('代码大全', 'Steve McConnell', '清华大学出版社', 128.0), ('你不知道的JavaScript', 'Kyle Simpson', '人民邮电出版社', 79.0); -- 3. 查询全部图书信息 __________(3)___________ -- 按价格升序排列并显示 SELECT * FROM books__________(4)___________ ; -- 将指定书名的价格改为新值 UPDATE books SET price = 75.0 WHERE title = 'Python编程从入门到实践'; -- 删除指定作者的全部记录 DELETE FROM books WHERE author = 'Steve McConnell'; -- 统计定价高于 50 元的图书数量及书名 SELECT COUNT(*), GROUP_CONCAT(title) FROM books WHERE price > 50; -- 4. 事务处理:给所有图书统一涨价 5 元 BEGIN TRANSACTION; __________(5)___________; -- 模拟一个错误(注释掉以下行可以避免错误,测试事务回滚) -- SELECT * FROM non_existent_table; COMMIT; -- 查询涨价后的图书信息 SELECT * FROM books",[14,19,30,39,48,57,66,75,84,93],{"answer":15,"createTime":5,"id":6,"options":16,"question":12,"source":17,"type":18},[],[],"v1",2,{"answer":20,"createTime":21,"id":22,"options":23,"question":28,"source":17,"type":29},[],"2025-12-29 06:13:47",291250118,[24,25,26,27],"D、喉管喷嘴堵塞","C、电路板坏掉","A、热敏电阻短路","B、加热棒短路","三角洲打印喷嘴温度升不上去,跟哪些因素无关( )",0,{"answer":31,"createTime":21,"id":32,"options":33,"question":38,"source":17,"type":29},[],291250119,[34,35,36,37],"C.可以满足大批量生产要求","B.满足少量化、个性化生产需求","A.打印精度最高","D.可以打印任何材料","相对传统制造方式,3D打印的优点是",{"answer":40,"createTime":21,"id":41,"options":42,"question":47,"source":17,"type":29},[],291250120,[43,44,45,46],"A.25%~40%","B.5%~10%","D.20%~50%","C.70%~90%","SLA原型的变形量中由于后固化收缩产生的比例是( )",{"answer":49,"createTime":21,"id":50,"options":51,"question":56,"source":17,"type":29},[],291250121,[52,53,54,55],"D、涂覆成型件","A、取出成型件","B、打磨成型件","C、去除支撑部分","FDM 3D打印技术成型件的后处理过程中最关键的步骤是( )",{"answer":58,"createTime":21,"id":59,"options":60,"question":65,"source":17,"type":29},[],291250122,[61,62,63,64],"C.99.95","B.95","D.100","A.90","SLS工艺是常见几种3D打印工艺中材料利用率最高的,可接近_____%",{"answer":67,"createTime":21,"id":68,"options":69,"question":74,"source":17,"type":29},[],291250123,[70,71,72,73],"D.小四边形","A.空间四边形","B.小三角形","C.空间三角形","STL文件采用一系列( )平面来逼近原来的模型",{"answer":76,"createTime":21,"id":77,"options":78,"question":83,"source":17,"type":29},[],291250124,[79,80,81,82],"A.3D 打印的耗材","C.3D 打印机的操作技能","B.增加产品应用领域","D.知识产权的保护","以下不是3D打印技术需要解决的问题是( )",{"answer":85,"createTime":21,"id":86,"options":87,"question":92,"source":17,"type":29},[],291250125,[88,89,90,91],"D.SLM","A.SLS","C.SLA","B.3DP","下列哪种3D打印工艺是基于喷射成型",{"answer":94,"createTime":21,"id":95,"options":96,"question":101,"source":17,"type":29},[],291250126,[97,98,99,100],"A、光敏树脂","C、陶瓷粉末","D、金属粉末","B、尼龙粉末","立体光固化成型设备使用的原材料为()"]